Abstract: Disclosed is a juice extractor capable of serving as a mixer, the juice extractor including a first motor (120) and a second motor (125) rotating at high speed; a first driving shaft (152) rotated at high speed by the first motor (120); a second driving shaft (154) disposed concentrically with the first driving shaft (152) as a dual shaft; and a main body (100) comprising a reducer disposed between the second driving shaft (154) and a motor shaft of the second motor (125) and reducing rotation speed of the second motor (125) to rotate the second driving shaft (154) at low speed; a mixer module (600) comprising a rotary blade (292) that couples with the first driving shaft (152) and rotates at high speed, and mounted to an upper portion of the main body (100); and a juice-extraction module (500) comprising a screw (300) that couples with the second driving shaft (154) and rotates at low speed, and mounted to the upper portion of the main body (100) in replacement of the mixer module (600).