A scroll compressor comprising: a housing; a fixed scroll fixed inside the housing and forming a discharge chamber between the fixed scroll and the housing; a movable scroll supported inside the housing so as to orbit only around an orbit axis and forming a compression chamber between the movable scroll and the fixed scroll, the movable scroll being supported by a bush that is rotatable around the orbit axis via a radial bearing; and a shaft support member fixed inside the housing and forming a back pressure chamber between the shaft support member and the movable scroll as well as a suction chamber between the shaft support member and the housing; the fixed scroll including a fixed base plate and a fixed spiral wrap integral with the fixed base plate; the movable scroll including a movable base plate facing to the fixed base plate and a movable spiral wrap integral with the movable base plate and meshing with the fixed spiral wrap; the movable scroll being formed with a supply passage configured to communicate the compression chamber with the back pressure chamber by an elastic deformation or displacement in a direction of the orbit axis of the movable scroll, the supply passage including an inflow opening opened to a distal end face of the movable spiral wrap and communicatable with the compression chamber, an outflow opening formed in the movable base plate to communicate with the back pressure chamber, and a communication hole communicating the inflow opening with the outflow opening; characterized in that the outflow opening is formed to communicate with an area surrounded by the radial bearing within the back pressure chamber at a position facing a rear end of a rotating shaft, and the communication hole extends straight from the inflow opening to the outflow opening in the direction of the orbit axis through the movable spiral wrap and the movable base plate. a housing; a fixed scroll fixed inside the housing and forming a discharge chamber between the fixed scroll and the housing; a movable scroll supported inside the housing so as to orbit only around an orbit axis and forming a compression chamber between the movable scroll and the fixed scroll, the movable scroll being supported by a bush that is rotatable around the orbit axis via a radial bearing; and a shaft support member fixed inside the housing and forming a back pressure chamber between the shaft support member and the movable scroll as well as a suction chamber between the shaft support member and the housing; the fixed scroll including a fixed base plate and a fixed spiral wrap integral with the fixed base plate; the movable scroll including a movable base plate facing to the fixed base plate and a movable spiral wrap integral with the movable base plate and meshing with the fixed spiral wrap; the movable scroll being formed with a supply passage configured to communicate the compression chamber with the back pressure chamber by an elastic deformation or displacement in a direction of the orbit axis of the movable scroll, the supply passage including an inflow opening opened to a distal end face of the movable spiral wrap and communicatable with the compression chamber, an outflow opening formed in the movable base plate to communicate with the back pressure chamber, and a communication hole communicating the inflow opening with the outflow opening; the outflow opening is formed to communicate with an area surrounded by the radial bearing within the back pressure chamber at a position facing a rear end of a rotating shaft, and the communication hole extends straight from the inflow opening to the outflow opening in the direction of the orbit axis through the movable spiral wrap and the movable base plate.