PROBLEM TO BE SOLVED: To provide a lightweight and compact joint massaging device which can be easily mounted and used on a flexed joint such as a knee. A joint part massaging device (1) for use by being attached to a joint part (11) in a bent state, which comprises a first body part (12), a joint (13), and a second body part (14), and the joint part when attached. 11 has a main body 2 that abuts each part of the body 11, and a fixing means 3 for mounting and fixing the main body 2 on the joint 11. The main body 2 has a helmet shape, and the joint 13 is inserted at the time of mounting. The body 2, which has the joint shell 22 and the hard shell 7 that is integrally formed in a continuous manner, has a compression unit, a vibration unit, a heating unit, and a control unit incorporated therein, and has a timer and a vibration. The control unit having a storage unit that stores a stimulation state sequence and a compression velocity state sequence, a memory, and an input / output unit includes the compression unit, the vibration unit, and the warming unit based on a signal from the input / output unit. The joint part 11 is massaged by controlling. [Selection diagram] Fig. 15【課題】膝などの屈曲した状態の関節部に気軽に装着して使用できる軽量かつコンパクトな関節部マッサージ器を提供すること。【解決手段】第一体部12と関節13と第二体部14の各部からなる、屈曲した状態の関節部11に装着して使用するための関節部マッサージ器1であり、装着時に関節部11の各部に当接する本体部2と、本体部2を関節部11に装着して固定するための固定手段3を有し、本体部2はヘルメット形状であって、装着時に関節13を挿入する関節挿入口22を有し、連続して一体に形成されてなる硬質の殻体7を含む本体部2には、圧迫手段と振動手段と加温手段と制御部が組み込まれ、タイマと、振動刺激状態列及び圧迫速度状態列を記憶した記憶手段と、メモリと、入出力部を有する前記制御部が、前記入出力部からの信号に基づいて前記圧迫手段、前記振動手段及び前記加温手段を制御することにより関節部11をマッサージする。【選択図】図15