A low-frequency electrotherapy device with stretchable adjustment comprises a flexible carrying portion and an electric stimulation unit. The flexible carrying portion has a fitting portion. The fitting portion has an elastic corrugated section with at least one extension unit. Each extension unit has two extension segments corresponding to each other and a bending segment respectively connected with the two extension segments and deformed by external force. The electric stimulation unit comprises a pulse generation portion, a pulse transmitting conductor electrically connected with the pulse generation portion, and an electrode portion connected with the pulse transmitting conductor. The pulse transmitting conductor has at least one electric conduction unit buried within the extension unit at the elastic corrugated section. Each electric conduction unit comprises two connection segments respectively disposed with respect to the extension segments, and a reverse segment connected with the connection segments and disposed with respect to the bending segment.一種可伸縮調整的低週波電療裝置,包含有一撓性承載部以及一電刺激單元。該撓性承載部具有一套接部,該套接部具有至少一延伸單元的彈性摺紋區間,每一該沿伸單元具有二相互對應的延伸段以及一分別相連該二延伸段並受外力作用產生形變的彎折段。該電刺激單元包含一脈衝產生部,一電性連接該脈衝產生部的脈衝傳輸導體以及一連接該脈衝傳輸導體的電極部,該脈衝傳輸導體於該彈性摺紋區間具有至少一埋設於該延伸單元內的導電單元,每一該導電單元包含有二分別對應該延伸段設置的連接段以及一相連於該連接段且對應該彎折段設置的反轉段。1‧‧‧撓性承載部11‧‧‧承載座12‧‧‧套接部121‧‧‧第一接合段122‧‧‧第二接合段13‧‧‧第一彈性摺紋區間13a‧‧‧第二彈性摺紋區間131‧‧‧延伸單元132‧‧‧延伸段133‧‧‧彎折段14‧‧‧貼附部23‧‧‧電極部26‧‧‧控制開關
