A magnetic tape cartridge includes a label provided on a front surface of a case, the label includes a coat layer that is formed on a front surface of a substrate attached to the case and scatters light reflected by the label with control of a surface shape and on which an identifier for identifying the magnetic tape cartridge is printed, and with the control of the surface shape, the coat layer has an average period of surface protrusions is equal to or smaller than 400 μm.