Provided is a magnetic tape device including: a magnetic head having a magnetic element that acts in proximity to a magnetic layer formed on a front surface of a magnetic tape; and a support member which is disposed at a position facing the magnetic head and against which a back surface of the magnetic tape provided on a side opposite to the front surface is pressed, in which the support member has a groove formed along a running direction of the magnetic tape only in a region corresponding to a non-acting region except for a region of the magnetic layer on which the magnetic element acts.

A recording and reproducing device of the present invention includes, a case; at least one recording medium having a disk-shape, a motor configured to rotate the at least one recording medium, a head configured to read or write information from or to the at least one recording medium, and an actuator configured to drive the head to scan in a radial direction of the at least one recording medium which are provided in the case; and a regulating portion configured to, when an external shock is applied to the at least one recording medium, contact an outer peripheral edge of the at least one recording medium to regulate displacements of the at least one recording medium due to bending of the at least one recording medium, wherein the regulating portion includes a regulating member which is movable in an axial direction parallel to a rotation axis of the at least one recording medium.

A recording and reproducing device including, a case; at least one recording medium having a disk-shape, a motor configured to rotate the at least one recording medium, a head configured to read or write information from or to the at least one recording medium, and an actuator configured to drive the head to scan in a radial direction of the at least one recording medium which are provided in the case; and a regulating portion configured to, when an external shock is applied to the at least one recording medium, contact an outer peripheral edge of the at least one recording medium to regulate displacements of the at least one recording medium due to bending of the at least one recording medium, wherein the regulating portion includes a regulating member which is movable in an axial direction parallel to a rotation axis of the at least one recording medium.

Provided is a magnetic tape device including: a magnetic head having a magnetic element that acts in proximity to a magnetic layer formed on a front surface of a magnetic tape; and a support member which is disposed at a position facing the magnetic head and against which a back surface of the magnetic tape provided on a side opposite to the front surface is pressed, in which the support member has a groove formed along a running direction of the magnetic tape only in a region corresponding to a non-acting region except for a region of the magnetic layer on which the magnetic element acts.