the armrest 2 can be shifted in the vertical direction fig1 to 16 show a second embodiment of a seat for a disabled person parts corresponding to those in the first embodiment are indicated at the same symbols and the explanation thereof is omitted in this embodiment an armrest 2 is usually supported on the side end portion of base frame tubes 10 by a pair of stays 17 and 17 which are longitudinally fixed on the lower surface of an arm rest frame 16 forming the skeleton of the arm rest 2 in such a manner as to extend downward at this time the arm rest 2 is supported through rails 33 and 33 vertically fixed on the side end portions of the base frame tubes 10 and brackets 34 are fixedly provided between the rails 33 and 33 and the base frame tubes 10 to prevent the tilting of the rails 33 and 33 further a rail supporting plate 35 is interposed between both the rails 33 and 33 for accurately keeping the distance between the two rails 33 and 33 disposed oppositely to each other each of the rails 33 and 33 is substantially u shaped in the cross section see fig1 and a slider 36 is inserted in the rail 33 so as to be slidably moved in the vertical direction the sliders 36 are fixed on the arm rest 2 side namely the sliders 36 are each fixed at the stays 17 and 17 on the armrest 2 side by two supporting shafts 37 and 37 provided so.