This invention discloses a circulating massaging machine for legs, comprising a bottom shell, a power device and two massaging assemblies, wherein the bottom shell is provided with two accommodating parts two first accommodating chambers and one second accommodating chamber are formed in each accommodating part each of the first accommodating chambers is obliquely provided with a guide rail the power device is provided with two butted shells each shell is internally provided with a drive, a driving rod and a cross screw the drive is a motor capable of operating forwards and reversely the driving rod is extended out of two sides of the shell so that the massaging assemblies are mounted by virtue of a combination sections extended out of two sides of the shell the cross screw penetrates out of the upside and downside of the shell in addition, the drive is matched up with the driving rod by virtue of a gear set so that the power of the drive can be transmitted to the driving rod the cross screw is provided thereon with a coupling gear which is internally provided with a one-way bearing and is connected to the gear set and each massaging assembly is provided with a first massage disc, an axle tube, a second massage disc, a spring and a stop member which are sequentially sleeved on the combination section from inside to outside and the stop member is fixedly arranged at the side end of the combination section.一種腿部循環式按摩機,其包含有:一底殼、一動力裝置與二按摩組件,其中,底殼上設有二容置部,內部形成有二第一容室與一第二容室,該第一容室中均斜向安裝有一導軌,動力裝置具有二相對合的殼體,殼體中設有一驅動器、一傳動桿與一十字螺桿,該驅動器為可正、反向運轉的馬達,傳動桿是伸出殼體兩側,俾利用伸出殼體兩側的結合段提供按摩組件安裝,而十字螺桿則往殼體的上、下方穿出,又驅動器與傳動桿間是利用一齒輪組的配合,讓驅動器的動力得以對傳動桿進行傳遞,在十字螺桿上則設有一內部具單向軸承,且與齒輪組進行連結的連動齒輪,按摩組件各具有由內往外依序套設在結合段上的一第一按摩盤、一軸管、一第二按摩盤、一彈簧,與一固設在結合段側端的擋件者。(10)‧‧‧底殼(11)‧‧‧容置部(12)‧‧‧第一容室(13)‧‧‧導軌(14)‧‧‧第二容室(20)‧‧‧動力裝置(21)‧‧‧殼體(24)‧‧‧十字螺桿(30)‧‧‧按摩組件(31)‧‧‧第一按摩盤(32)‧‧‧軸管(33)‧‧‧第二按摩盤(34)‧‧‧彈簧(35)‧‧‧擋件(351)‧‧‧軌槽