A tape-type magnetic recording medium, includes a substrate; and a magnetic layer provided on the substrate. In a case where wmax and wmin are respectively maximum and minimum of average values of width of the magnetic recording medium measured under four environments whose temperature and relative humidity are (10° C., 10%), (10° C., 80%), (29° C., 80%), and (45° C., 10%), respectively, wmax and wmin satisfy a relation of (wmax−wmin)/wmin≤400 [ppm]. The substrate contains polyester, and the magnetic layer has a squareness ratio of 65% or more in the vertical direction.