A one-gate-rotor single-screw compressor comprising: a single screw rotor having helical screw grooves; one gate rotor having gates meshing with the screw grooves, wherein the single screw rotor and the one gate rotor are provided as a pair of rotors within the casing; a casing internally having a cylinder into which the screw rotor is rotatably inserted; a compression chamber defined inside the cylinder by the screw rotor and the gate rotor meshing with each other; and a slide valve mechanism configured to adjust an opening area of a cylinder opening (51A, 51B) of the cylinder, the cylinder opening (51A, 51B) communicating with the compression chamber, the slide valve mechanism including: a plurality of valve members (52A, 52B) arranged in the compression chamber, the valve members (52A, 52B) moving in an axial direction of the screw rotor to adjust the opening area; a plurality of valve housing portions (53A, 53B) of the casing, the valve members (52A, 52B) being separately housed in respective ones of said plurality of valve housing portions (53A, 53B),. a driving mechanism configured to move at least one of the valve members (52A, 52B) as a target member to be driven; and an interlocking mechanism configured to move another one of the valve members (52A, 52B) as a following target member following the target member to be driven. a single screw rotor having helical screw grooves; one gate rotor having gates meshing with the screw grooves, wherein the single screw rotor and the one gate rotor are provided as a pair of rotors within the casing; one gate rotor having gates meshing with the screw grooves, wherein the single screw rotor and the one gate rotor are provided as a pair of rotors within the casing; a casing internally having a cylinder into which the screw rotor is rotatably inserted; a compression chamber defined inside the cylinder by the screw rotor and the gate rotor meshing with each other; and a slide valve mechanism configured to adjust an opening area of a cylinder opening (51A, 51B) of the cylinder, the cylinder opening (51A, 51B) communicating with the compression chamber, the slide valve mechanism including: a plurality of valve members (52A, 52B) arranged in the compression chamber, the valve members (52A, 52B) moving in an axial direction of the screw rotor to adjust the opening area; a plurality of valve housing portions (53A, 53B) of the casing, the valve members (52A, 52B) being separately housed in respective ones of said plurality of valve housing portions (53A, 53B),. a driving mechanism configured to move at least one of the valve members (52A, 52B) as a target member to be driven; and an interlocking mechanism configured to move another one of the valve members (52A, 52B) as a following target member following the target member to be driven. a compression chamber defined inside the cylinder by the screw rotor and the gate rotor meshing with each other; and a slide valve mechanism configured to adjust an opening area of a cylinder opening (51A, 51B) of the cylinder, the cylinder opening (51A, 51B) communicating with the compression chamber, the slide valve mechanism including: a plurality of valve members (52A, 52B) arranged in the compression chamber, the valve members (52A, 52B) moving in an axial direction of the screw rotor to adjust the opening area; a plurality of valve housing portions (53A, 53B) of the casing, the valve members (52A, 52B) being separately housed in respective ones of said plurality of valve housing portions (53A, 53B),. a driving mechanism configured to move at least one of the valve members (52A, 52B) as a target member to be driven; and an interlocking mechanism configured to move another one of the valve members (52A, 52B) as a following target member following the target member to be driven. a plurality of valve members (52A, 52B) arranged in the compression chamber, the valve members (52A, 52B) moving in an axial direction of the screw rotor to adjust the opening area; a plurality of valve housing portions (53A, 53B) of the casing, the valve members (52A, 52B) being separately housed in respective ones of said plurality of valve housing portions (53A, 53B),. a driving mechanism configured to move at least one of the valve members (52A, 52B) as a target member to be driven; and an interlocking mechanism configured to move another one of the valve members (52A, 52B) as a following target member following the target member to be driven.