A wearable action-assistance device includes a hip frame that is capable of being worn on hips of a wearer, a lower limb frame that is capable of being worn on a lower limb of the wearer, a plurality of drive portions provided on the lower limb frame in correspondence with joints of the wearer, and a control portion that controls the drive portions based on a signal that is caused by an action of the wearer. The lower limb frame has a variable shape portion that can bend a portion other than the drive portions to left and right to adjust a flexion angle thereof.
