To provide a highly-functional caster walker which is easily used by not only an aged person but also a physically handicapped person and can be handled in a right walking posture.

The lower parts of two constitution frames 1 nearly in the form of L are connected by a connecting frame 2, and a handle bar 3 is connected to the tilting frame part of upper parts to frame-constitute a caster walker main body 4. Next, casters 5 are fixed at the four places of the lower part of the main body 4, and a seat plate 7 for vertically opening and closing with a hinge part 6 as a supporting point is provided at the frame 2. Further, a brake lever 10 connected with a wire for braking the casters 5 is fitted to the frame 1 connected with the bar 3 to constitute the main body 4.