PROBLEM TO BE SOLVED: To provide a power-assisted wheel unit which is securely attached to an existing frame and enables cost reduction.SOLUTION: A power-assisted wheel unit A integrally includes: a motor with a speed reducer which rotates a driving shaft a wheel 13r which is supported so as to rotate relative to the driving shaft a bracket 100 which extends along the frame 11 of a vehicle body and fixes the motor with the speed reducer and the wheel 13r to the frame 11 and a brake member 110 which applies a braking force to the wheel 13r.SELECTED DRAWING: Figure 15COPYRIGHT: (C)2017,JPO&INPIT【課題】既存のフレームに対して強固に取り付けることができ、しかもコストを抑える。【解決手段】電動アシスト車輪ユニットAは、駆動軸を回転させる減速機付モータと、駆動軸に対して相対回転可能に支持された車輪13rと、車体のフレーム11に沿って延び、減速機付モータ、及び車輪13rをフレーム11に固定するブラケット100と、車輪13rに制動力を付与するブレーキ部材110と、を一体に備える。【選択図】図15