To provide a resistance force control structure of a wheeled walker having a high safety by limiting the rotation speed of a wheel with a brake oil or a resistance due to a magnetic force.A housing space (10) is formed inside a housing module (1), a fixing member (11) and a movable member are installed in a housing space (10), one end of a wheel shaft (15) is inserted through a fixing member (11) and fixed to each other, The cover 2 covers the accommodation space 10 to form a sealed space, the other end of the wheel shaft 15 penetrates the outer cover 2, and by relatively moving the movable member and the fixed member 11, braking filled in the accommodation space 10 The resistance by the oil 20 or the resistance due to the magnetic force acting between the movable member and the fixed member 11 is changed to control the rotation speed of the wheel.(FIG.【課題】制動油または磁力による抵抗で車輪の回転速度を制限し、安全性が高い車輪付き歩行器の抵抗力制御構造を提供すること。【解決手段】ハウジングモジュール1の内部に収容空間10が形成され、固定部材11と可動部材が収容空間10に設置され、車輪軸15の一端が固定部材11に挿通されて相互に固定され、アウターカバー2は収容空間10を被覆して封鎖空間を形成し、車輪軸15の他端がアウターカバー2を貫通し、可動部材と固定部材11を相対移動させることにより、収容空間10に充填した制動油20による抵抗、あるいは、可動部材と固定部材11の間に働く磁力による抵抗を変化させ、車輪の回転速度を制御する。【選択図】図3