To provide a simple exercise device which solves such problems that a person with difficulty in walking due to the reduction of the number of walks due to knee pain and the decline of leg muscle force is presently increased in connection with advanced age, and many phenomena resulting in bedridden by not being able to walk with the progress are generated, and attempts easy walking by increasing the leg traction muscular strength.

In a leg stretch muscular force strengthening device, a patient is made to lie on a bed on his/her back and the ankle is fixed. The bed is inclined in the head side down, and the body is made to slip down by self weight, The body gravity is applied to the knee joint, the knee is stretched, and the knee joint is released from oppression. Also, the buttock is put on a moving dolly on the bed, the waist is brought close to the ankle, a reciprocative sliding movement is performed, and the leg traction muscular strength can be increased by bending and stretching exercise in the state that no body gravity is applied. The gravity of body slipping down increases if the bed is optionally inclined toward the head side down, and the leg traction muscular strength is further increased by bending and stretching.