A centrifugal pump (1, 1A, 1B, 1C) comprising: a housing that is provided with a housing main body which is configured with a hollow body, a blood inlet port which is tubularly formed so as to protrude from the housing main body, which is in communication with the housing main body, and through which blood can flow in, and a blood outlet port which is provided at a position different from that of the blood inlet port in the housing main body and through which the blood can flow out; a centrifugal force applying member that is rotatably accommodated inside the hollow portion and rotates so as to apply centrifugal force to the blood; and a support mechanism that supports the centrifugal force applying member such that the centrifugal force applying member can rotate with respect to the housing, wherein the support mechanism is provided with a shaft member which is installed at a rotation center of the centrifugal force applying member, a first bearing which rotatably supports one end portion of the shaft member and is installed in an inner peripheral portion of the blood inlet port, and a second bearing which rotatably supports the other end portion of the shaft member, wherein the first bearing is provided with a blood flow path forming surface (200, 300) which faces an inner side of the blood inlet port and forms a flow path for the blood together with an inner peripheral surface of the blood inlet port, wherein the blood flow path forming surface (200, 300) is positioned at the same distance as the inner peripheral surface of the blood inlet port from a central axis of the blood inlet port or is positioned so as to be closer to the central axis side of the blood inlet port than the inner peripheral surface of the blood inlet port, and a flow straightening portion, which is provided on the upstream side of the first bearing, the flow straightening portion being provided so as to protrude toward the central axis side from the inner peripheral surface of the blood inlet port, and to extend along the central axis, characterized by a cross-sectional shape of the flow straightening portion forms a substantial triangle having an apex on the central axis side, and a pair of side surfaces of the flow straightening portion being curved in a direction of approaching each other. a housing that is provided with a housing main body which is configured with a hollow body, a blood inlet port which is tubularly formed so as to protrude from the housing main body, which is in communication with the housing main body, and through which blood can flow in, and a blood outlet port which is provided at a position different from that of the blood inlet port in the housing main body and through which the blood can flow out; a centrifugal force applying member that is rotatably accommodated inside the hollow portion and rotates so as to apply centrifugal force to the blood; and a support mechanism that supports the centrifugal force applying member such that the centrifugal force applying member can rotate with respect to the housing, wherein the support mechanism is provided with a shaft member which is installed at a rotation center of the centrifugal force applying member, a first bearing which rotatably supports one end portion of the shaft member and is installed in an inner peripheral portion of the blood inlet port, and a second bearing which rotatably supports the other end portion of the shaft member, wherein the first bearing is provided with a blood flow path forming surface (200, 300) which faces an inner side of the blood inlet port and forms a flow path for the blood together with an inner peripheral surface of the blood inlet port, wherein the blood flow path forming surface (200, 300) is positioned at the same distance as the inner peripheral surface of the blood inlet port from a central axis of the blood inlet port or is positioned so as to be closer to the central axis side of the blood inlet port than the inner peripheral surface of the blood inlet port, and a flow straightening portion, which is provided on the upstream side of the first bearing, the flow straightening portion being provided so as to protrude toward the central axis side from the inner peripheral surface of the blood inlet port, and to extend along the central axis, characterized by a cross-sectional shape of the flow straightening portion forms a substantial triangle having an apex on the central axis side, and a pair of side surfaces of the flow straightening portion being curved in a direction of approaching each other.