A centrifugal compressor comprising: a rotary shaft which is configured to rotate around an axis; an impeller having a disk fixed to the rotary shaft, a plurality of blades provided on a surface of the disk facing a first side in an axial direction and provided at intervals in a circumferential direction around the axis, and a cover provided on the first side in the axial direction with respect to the disk and the blades and having an outer peripheral surface extending outward in a radial direction toward a second side in the axial direction; a housing having a housing main body and covering the rotary shaft and the impeller, and having a facing surface formed on the first side in the axial direction with respect to the outer peripheral surface and facing the outer peripheral surface; a seal member forming a clearance with the outer peripheral surface inward of the facing surface in the radial direction in the housing; a plurality of inclined holes formed at intervals in the circumferential direction with respect to the seal member, respectively extending at an angle (θ) to a side opposite to a direction of rotation of the rotary shaft toward an inner side in the radial direction, and having an opening portion opening at a position facing the outer peripheral surface; a first fin disposed on the seal member on the second side in the axial direction with respect to the opening portion, and protruding from the seal member toward the outer peripheral surface; and a communication flow path portion (64;64B) formed in the housing, having an introduction port (66i;66Bi) opening at a position facing the outer peripheral surface inward in the radial direction of an outer peripheral end on an outermost side in the radial direction in the cover, and communicating with the plurality of inclined holes, characterized in that the housing has a seal holder (60;60B) detachably provided from the housing main body and holding the seal member, and the communication flow path portion (64;64B) is formed in the seal holder (60;60B), wherein the communication flow path portion (64;64B) has a circumferential flow path (67;67B) continuous in the circumferential direction and communicating with the plurality of inclined holes, and a plurality of introduction flow paths (66;66B) connecting the introduction port (66i;66Bi) and the circumferential flow path (67;67B). a rotary shaft which is configured to rotate around an axis; an impeller having a disk fixed to the rotary shaft, a plurality of blades provided on a surface of the disk facing a first side in an axial direction and provided at intervals in a circumferential direction around the axis, and a cover provided on the first side in the axial direction with respect to the disk and the blades and having an outer peripheral surface extending outward in a radial direction toward a second side in the axial direction; a housing having a housing main body and covering the rotary shaft and the impeller, and having a facing surface formed on the first side in the axial direction with respect to the outer peripheral surface and facing the outer peripheral surface; a seal member forming a clearance with the outer peripheral surface inward of the facing surface in the radial direction in the housing; a plurality of inclined holes formed at intervals in the circumferential direction with respect to the seal member, respectively extending at an angle (θ) to a side opposite to a direction of rotation of the rotary shaft toward an inner side in the radial direction, and having an opening portion opening at a position facing the outer peripheral surface; a first fin disposed on the seal member on the second side in the axial direction with respect to the opening portion, and protruding from the seal member toward the outer peripheral surface; and a communication flow path portion (64;64B) formed in the housing, having an introduction port (66i;66Bi) opening at a position facing the outer peripheral surface inward in the radial direction of an outer peripheral end on an outermost side in the radial direction in the cover, and communicating with the plurality of inclined holes, characterized in that the housing has a seal holder (60;60B) detachably provided from the housing main body and holding the seal member, and the communication flow path portion (64;64B) is formed in the seal holder (60;60B), wherein the communication flow path portion (64;64B) has a circumferential flow path (67;67B) continuous in the circumferential direction and communicating with the plurality of inclined holes, and a plurality of introduction flow paths (66;66B) connecting the introduction port (66i;66Bi) and the circumferential flow path (67;67B).