A double-headed piston swash plate type compressor comprising: a pair of cylinder blocks (12, 13), which forms a housing and has a crank chamber; a first cylinder bore and a second cylinder bore, which are respectively formed in the two cylinder blocks (12, 13) to form a pair; a double-headed piston reciprocally received in the first and second cylinder bores (12a, 13a); a rotary shaft, which is rotationally supported by the housing; a drive force transmitting member, which is accommodated in the crank chamber and fixed to the rotary shaft to rotate integrally with the rotary shaft; and a swash plate, which is accommodated in the crank chamber and rotated by a drive force of the rotary shaft via the drive force transmitting member, wherein an inclination angle of the swash plate relative to the rotary shaft is changeable, the drive force transmitting member has a link portion that guides the swash plate to change the inclination angle, and the double-headed piston is engaged with the swash plate and is reciprocated by a stroke that corresponds to the inclination angle of the swash plate; the double-headed piston swash plate type compressor being characterized by: a movable body, which is coupled to the swash plate and capable of changing the inclination angle of the swash plate; and a control pressure chamber, which is defined by the movable body and the drive force transmitting member, wherein the drive force transmitting member and the movable body are arranged on one side of the swash plate in an axial direction of the rotary shaft, control gas is introduced into the control pressure chamber to change an internal pressure of the control pressure chamber, so that the movable body is moved in the axial direction of the rotary shaft, the movable body includes a bottom portion, through which the rotary shaft extends, and a cylindrical portion, which extends from the bottom portion in the axial direction of the rotary shaft to surround the rotary shaft, and the cylindrical portion is permitted to move in the axial direction of the rotary shaft while sliding along a part of the drive force transmitting member, so that the inclination angle of the swash plate is changed in accordance with changes in the internal pressure of the control pressure chamber. a pair of cylinder blocks (12, 13), which forms a housing and has a crank chamber; a first cylinder bore and a second cylinder bore, which are respectively formed in the two cylinder blocks (12, 13) to form a pair; a double-headed piston reciprocally received in the first and second cylinder bores (12a, 13a); a rotary shaft, which is rotationally supported by the housing; a drive force transmitting member, which is accommodated in the crank chamber and fixed to the rotary shaft to rotate integrally with the rotary shaft; and a swash plate, which is accommodated in the crank chamber and rotated by a drive force of the rotary shaft via the drive force transmitting member, wherein an inclination angle of the swash plate relative to the rotary shaft is changeable, the drive force transmitting member has a link portion that guides the swash plate to change the inclination angle, and the double-headed piston is engaged with the swash plate and is reciprocated by a stroke that corresponds to the inclination angle of the swash plate; the double-headed piston swash plate type compressor being characterized by: a movable body, which is coupled to the swash plate and capable of changing the inclination angle of the swash plate; and a control pressure chamber, which is defined by the movable body and the drive force transmitting member, wherein the drive force transmitting member and the movable body are arranged on one side of the swash plate in an axial direction of the rotary shaft, control gas is introduced into the control pressure chamber to change an internal pressure of the control pressure chamber, so that the movable body is moved in the axial direction of the rotary shaft, the movable body includes a bottom portion, through which the rotary shaft extends, and a cylindrical portion, which extends from the bottom portion in the axial direction of the rotary shaft to surround the rotary shaft, and the cylindrical portion is permitted to move in the axial direction of the rotary shaft while sliding along a part of the drive force transmitting member, so that the inclination angle of the swash plate is changed in accordance with changes in the internal pressure of the control pressure chamber. a movable body, which is coupled to the swash plate and capable of changing the inclination angle of the swash plate; and a control pressure chamber, which is defined by the movable body and the drive force transmitting member, wherein the drive force transmitting member and the movable body are arranged on one side of the swash plate in an axial direction of the rotary shaft, control gas is introduced into the control pressure chamber to change an internal pressure of the control pressure chamber, so that the movable body is moved in the axial direction of the rotary shaft, the movable body includes a bottom portion, through which the rotary shaft extends, and a cylindrical portion, which extends from the bottom portion in the axial direction of the rotary shaft to surround the rotary shaft, and the cylindrical portion is permitted to move in the axial direction of the rotary shaft while sliding along a part of the drive force transmitting member, so that the inclination angle of the swash plate is changed in accordance with changes in the internal pressure of the control pressure chamber.