Employed is a plated steel material including a plated layer arranged on a surface of a base steel material, wherein the plated layer includes, in terms of mass %, 5.0 to 40.0% of Al, 0.5 to 15.0% of Mg, and 5.0 to 40.0% of Fe, and further includes a balance including Zn and impurities, in a cross section perpendicular to a surface of the plated steel material, when observing an observation region which is a cross section of the plated steel material having a predetermined length in a direction parallel to the surface of the plated steel material, a length L of a boundary line between the plated layer and the base steel material satisfies a following formula (1), the plated layer includes a first region where an Fe concentration is less than 5.0 mass %, a second region where an Fe concentration is 5.0 mass % or more, and the first region includes an Al-containing phase at an area fraction of 5% or more;

[00001]$\begin{array}{cc}\left(L-L_0\right)/L_{0}1002.\left(\%\right),& \left(1\right)\end{array}$ L.sub.0 is a linear distance between one end and another end of the boundary line in the observation region, and L is a length of the boundary line between the one end and the other end.