An ethylene-propylene-diene rubber foamed material is obtained by foaming a rubber composition containing an ethylene-propylene-diene rubber. The rate of change of the 80 % compressive load value CL2 after being heated at 150 DEG C for 10 days to the 80 % compressive load value CL1 before being heated is -50 % or more and 50 % or less, wherein the 80 % compressive load value CL1 before being heated is 0.5 N/cm 2 or more and 10 N/cm 2 or less.