To provide a mat for massage provided with a heater with improved air permeability in the hot period of summer while not making a heater mat be shifted from the surface of a mat main body for the massage at the time of using the heater mat such as an electric spreading blanket or the like.

This mat for the massage with the heater is provided with the mat main body 1 for the massage for which an air bag 6 to be expanded and contracted by the supply/discharge of air is provided inside and a heater mat 9 with a built-in heater 11 used by being disposed so as to cover the surface of the mat main body 1. A sliding fastener 20 for attachably and detachably connecting the heater mat 9 to the mat main body 1 is interposed between the heater mat 9 and the mat main body 1.