A variable displacement swash plate type compressor comprising: a housing in which a suction chamber, a discharge chamber, a swash plate chamber and a cylinder bore are formed; a drive shaft that is rotatably supported by the housing; a swash plate rotatable in the swash plate chamber by rotation of the drive shaft; a link mechanism that is provided between the drive shaft and the swash plate, and allows change of an inclination angle of the swash plate to a direction orthogonal to a drive shaft axis of the drive shaft; a piston that is accommodated in the cylinder bore to be capable of reciprocating; a conversion mechanism (11a, 11b) that causes the piston to reciprocate in the cylinder bore at a stroke corresponding to the inclination angle, by rotation of the swash plate; an actuator capable of changing the inclination angle, and a control mechanism that controls the actuator, wherein the suction chamber and the swash plate chamber communicate with each other, the link mechanism has a lug member that is fixed to the drive shaft in the swash plate chamber, and faces the swash plate, and a swash plate arm in which rotation of the drive shaft is transmitted to the swash plate from the lug member, the actuator has the lug member, a movable body that is disposed between the lug member and the swash plate to engage with the swash plate to be integrally rotatable, and moves in a direction of the drive shaft axis to be able to change the inclination angle, and a control pressure chamber that is defined by the lug member and the movable body, and moves the movable body by an internal pressure, characterised in that on the movable body, a first acting portion and a second acting portion that engage with the swash plate are formed, on the swash plate, an affected portion that engages with the first acting portion and the second acting portion is formed, in the swash plate, a top dead center corresponding portion is defined as a portion corresponding to a top dead center of the piston, the first acting portion, the second acting portion and the affected portion are located eccentrically to the top dead center corresponding portion side in the swash plate from the drive shaft axis, and the first acting portion and the second acting portion are paired by stepping across a top dead center surface that is formed by the top dead center corresponding portion and the drive shaft axis. a housing in which a suction chamber, a discharge chamber, a swash plate chamber and a cylinder bore are formed; a drive shaft that is rotatably supported by the housing; a swash plate rotatable in the swash plate chamber by rotation of the drive shaft; a link mechanism that is provided between the drive shaft and the swash plate, and allows change of an inclination angle of the swash plate to a direction orthogonal to a drive shaft axis of the drive shaft; a piston that is accommodated in the cylinder bore to be capable of reciprocating; a conversion mechanism (11a, 11b) that causes the piston to reciprocate in the cylinder bore at a stroke corresponding to the inclination angle, by rotation of the swash plate; an actuator capable of changing the inclination angle, and a control mechanism that controls the actuator, wherein the suction chamber and the swash plate chamber communicate with each other, the link mechanism has a lug member that is fixed to the drive shaft in the swash plate chamber, and faces the swash plate, and a swash plate arm in which rotation of the drive shaft is transmitted to the swash plate from the lug member, the actuator has the lug member, a movable body that is disposed between the lug member and the swash plate to engage with the swash plate to be integrally rotatable, and moves in a direction of the drive shaft axis to be able to change the inclination angle, and a control pressure chamber that is defined by the lug member and the movable body, and moves the movable body by an internal pressure, characterised in that on the movable body, a first acting portion and a second acting portion that engage with the swash plate are formed, on the swash plate, an affected portion that engages with the first acting portion and the second acting portion is formed, in the swash plate, a top dead center corresponding portion is defined as a portion corresponding to a top dead center of the piston, the first acting portion, the second acting portion and the affected portion are located eccentrically to the top dead center corresponding portion side in the swash plate from the drive shaft axis, and the first acting portion and the second acting portion are paired by stepping across a top dead center surface that is formed by the top dead center corresponding portion and the drive shaft axis.