An assist apparatus includes: a shoulder harness； an actuator； a power transmission member connected to the actuator； a pulley support portion； a leg-side pulley； a knees-linking member； a left knee harness to be fitted to a left knee region of the wearer, the left knee harness being connected to a first end of the knees-linking member； a right knee harness to be fitted to a right knee region of the wearer, the right knee harness being connected to a second end of the knees-linking member； a posture detection device that detects a posture of the wearer； and a control device that controls the actuator based on information of the posture of the wearer, the posture being detected by the posture detection device.
