An action assist apparatus A includes a pad (23) configured to transmit an assist force to an assist region of a user. The pad (23) has a pressure sensor (23a) configured to detect a state of the assist region, and a first assist force application portion (23b) and a second assist force application portion (23c) which are switchable independently between an assist force transmitting state and a non-transmitting state. A control unit (65) switches the first assist force application portion (23b) and the second assist force application portion (23c) based on the state of the assist region.