PROBLEM TO BE SOLVED: To secure stability at the time when a user stands up, and prevent a base frame from interfering with walking when the user walks by making it compact.SOLUTION: A walker 1 includes a main frame 2 which is equipped with a plurality of wheels 9 and includes a pair of expansion/contraction parts 5 that can be expanded/contracted to the rear side by an actuator 6 from the left side and the right side of a standing position of a user U respectively, a support frame 3 rotatably attached to the main frame 2 for supporting upper limbs of the user U, and a side frame 4 rotatably attached to each of the expansion/contraction parts 5, and rotatably attached to the support frame 3. Rear wheels 9b of the plurality of wheels 9 are disposed at the rear end part of the expansion/contraction part 5.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】ユーザが立ち上がる際の安定性を確保するとともに、歩行時にはベースフレームをコンパクトにして歩行のじゃまになることを回避する。【解決手段】複数の車輪9を備え、ユーザUの起立位置の左側及び右側のそれぞれからアクチュエータ6によって後方側に向けて伸縮可能な一対の伸縮部5を備えるメインフレーム2と、メインフレーム2に回転可能に取り付けられ、ユーザUの上肢を支持する支持フレーム3と、伸縮部5のそれぞれに回転可能に取り付けられ、かつ支持フレーム3に回転可能に取り付けられるサイドフレーム4と、を備える歩行器1であって、複数の車輪9のうち後輪9aは、伸縮部5の後端部分に配置される。【選択図】図1