A magnetic toner comprising a toner particle comprising a binder resin and a magnetic body, wherein the binder resin comprises a styrene-acrylic resin, the styrene-acrylic resin comprises a monomer unit represented by Formula (1):

##STR00001## where, in Formula (1), R.sup.1 represents a hydrogen atom or a methyl group; and R.sup.2 represents a linear alkyl group having C.sub.B carbon atoms, C.sub.B being an integer from 10 to 15; the magnetic body comprises an alkyl group having C.sub.M carbon atoms, on a surface of the magnetic body, C.sub.M being an integer from 4 to 20; C.sub.B and C.sub.M satisfy Formula (3):

|C.sub.M−C.sub.B|≤10  (3), and in a cross-sectional observation of the magnetic toner using a transmission electron microscope, a coefficient of variation of an occupied area ratio of the magnetic body in a specific square grid, is 80.0% or lower.

Provided is a magnetic toner having a toner particle containing a binder resin and a magnetic body, wherein the binder resin contains a polymer A having a first monomer unit and a second monomer unit, the first polymerizable monomer is at least one selected from the group consisting of the (meth)acrylic acid esters having C.sub.18-36 alkyl groups, a content of the first monomer unit and a content of the second monomer unit based on the total moles of all monomer units in the polymer A are respectively 5.0 to 60.0 mol % and 20.0 to 95.0 mol %, and assuming that an SP value of the first monomer unit and the second monomer unit are taken as SP.sub.11 (J/cm.sup.3).sup.0.5 and SP.sub.21(J/cm.sup.3).sup.0.5, respectively, 3.00≤(SP.sub.21−SP.sub.11)≤25.00 is satisfied, and an oil absorption of the magnetic body is 5 to 40 ml/100 g.

A toner comprising a toner particle comprising a magnetic body, and a silica fine particle on a surface of the toner particle, wherein fragment ions corresponding to a D unit structure are observed in a specific measurement; when the silica fine particle is dispersed in a mixed solution of ethanol and aqueous solution of NaCl, followed by a titration operation using sodium hydroxide, a titer is within a specific range; in a chemical shift obtained by a specific measurement, with D as an area of a peak having a peak top present in a range from 25 to 15 ppm, and with D1 as an area of a peak having a peak top present in a range of more than 19 ppm and 17 ppm or less, D and D1 are in a specific ratio; and the magnetic body is present on the surface of the toner particle.

A magnetic carrier comprising a magnetic carrier core and a resin coating layer formed on the surface of the magnetic carrier core, wherein the resin coating layer includes a polymer having a structure represented by the following formula (1), and a content ratio of the structure represented by the formula (1) is from 5% by mass to 95% by mass based on a resin component of the resin coating layer, ##STR00001##
wherein, R.sup.1 is H or CH.sub.3, and X is a structure represented by the following formula (2):
(C.sub.mH.sub.2m)R.sup.2(C.sub.nH.sub.2n)OH(2)
wherein, R.sup.2 is a hydrocarbon group being a cyclic structure having 4 to 8 carbon atoms, and m and n are integers of 0 to 4.

A magnetic carrier comprising a magnetic carrier core and a resin coating layer formed on the surface of the magnetic carrier core, wherein the resin coating layer includes a polymer having a structure represented by the following formula (1), and a content ratio of the structure represented by the formula (1) is from 5% by mass to 95% by mass based on a resin component of the resin coating layer,

##STR00001## wherein, R.sup.1 is H or CH.sub.3, and X is a structure represented by the following formula (2):

(C.sub.mH.sub.2m)R.sup.2(C.sub.nH.sub.2n)OH (2) wherein, R.sup.2 is a hydrocarbon group being a cyclic structure having 4 to 8 carbon atoms, and m and n are integers of 0 to 4.

Provided is a magnetic toner having a toner particle containing a binder resin and a magnetic body, wherein the binder resin contains a polymer A having a first monomer unit and a second monomer unit, the first polymerizable monomer is at least one selected from the group consisting of the (meth)acrylic acid esters having C.sub.18-36 alkyl groups, a content of the first monomer unit and a content of the second monomer unit based on the total moles of all monomer units in the polymer A are respectively 5.0 to 60.0 mol % and 20.0 to 95.0 mol %, and assuming that an SP value of the first monomer unit and the second monomer unit are taken as SP.sub.11 (J/cm.sup.3).sup.0.5 and SP.sub.21(J/cm.sup.3).sup.0.5, respectively, 3.00(SP.sub.21SP.sub.11)25.00 is satisfied, and an oil absorption of the magnetic body is 5 to 40 ml/100 g.

A carrier is provided. The carrier includes a magnetic core particle and a resin layer coating a surface of the magnetic core particle. The resin layer includes a resin, a conductive particle including tungsten tin oxide, and a chargeable filler.

A magnetic carrier comprising: a magnetic material-dispersed resin carrier core material; and a resin coating layer on the surface of the magnetic material-dispersed resin carrier core material, wherein the magnetic material-dispersed resin carrier core material contains a core material particle containing a magnetic material and a binder resin, and a primer compound having an amino group, the resin coating layer contains a coating resin A, which is a polymer of monomers including at least a (meth)acrylic acid ester having an alicyclic hydrocarbon group, and the content of the primer compound in the magnetic material-dispersed resin carrier core material and the content of the resin coating layer are in specific range.

A carrier is provided. The carrier includes a magnetic core particle and a resin layer coating a surface of the magnetic core particle. The resin layer includes a resin, a conductive particle including tungsten tin oxide, and a chargeable filler.

Provided is a magnetic toner which exhibits a high degree of blackness and high tinting strength, and in which scraping of a toner carrying member surface by the magnetic toner is not caused, and image defects such as fogging and tailing are suppressed. A magnetic toner comprising a magnetic toner particle that contains a binder resin and a magnetic iron oxide particle, wherein, the number-average particle diameter of the magnetic iron oxide particle ranges from 0.05 m to 0.15 m, and a relationship between the number-average particle diameter (m) of the magnetic iron oxide particle and the specific surface area (m.sup.2/g) of the magnetic iron oxide particle satisfies Expression (1) below.
[Numberaverage particle diameter][specific surface area]1.10(1).