A baffle plate to be attached to a fluid flow-forming body, the fluid flow-forming body comprising: a columnar main body; a flat end face formed at the main body; a concave part formed at the end face; and a fluid flow-forming means for forming a fluid swirl flow in the concave part or forming a radial flow by discharging fluid into the concave part, the fluid swirl flow or the radial flow generating negative pressure that applies suction to a member, the baffle plate comprising: a baffle plate main body that is adapted to be attachable to and detachable from the fluid flow-forming body, and that is adapted to allow a fluid to which suction is applied by the negative pressure to pass through, while preventing the member from entering the concave part; and a support member that is attached to the main body at one end of the support member, and supports the baffle plate main body at another end of the support member such that the baffle plate main body opposes the end face, and that supports the baffle plate main body such that a gap between the end face and the baffle plate main body is maintained, and a fluid path is formed that allows a fluid flowing out of the concave part to flow; and a gap maintaining part that is adapted to maintain the gap between the end face and the baffle plate main body; wherein the support member comprises a claw part that is adapted to be hooked on a surface of the main body, the surface being opposite the end face; the gap maintaining part and the claw part being adapted to hold the main body therebetween; and the gap maintaining part being adapted to form the fluid path. a columnar main body; a flat end face formed at the main body; a concave part formed at the end face; and a fluid flow-forming means for forming a fluid swirl flow in the concave part or forming a radial flow by discharging fluid into the concave part, the fluid swirl flow or the radial flow generating negative pressure that applies suction to a member, the baffle plate comprising: a baffle plate main body that is adapted to be attachable to and detachable from the fluid flow-forming body, and that is adapted to allow a fluid to which suction is applied by the negative pressure to pass through, while preventing the member from entering the concave part; and a support member that is attached to the main body at one end of the support member, and supports the baffle plate main body at another end of the support member such that the baffle plate main body opposes the end face, and that supports the baffle plate main body such that a gap between the end face and the baffle plate main body is maintained, and a fluid path is formed that allows a fluid flowing out of the concave part to flow; and a gap maintaining part that is adapted to maintain the gap between the end face and the baffle plate main body; wherein the support member comprises a claw part that is adapted to be hooked on a surface of the main body, the surface being opposite the end face; the gap maintaining part and the claw part being adapted to hold the main body therebetween; and the gap maintaining part being adapted to form the fluid path. a baffle plate main body that is adapted to be attachable to and detachable from the fluid flow-forming body, and that is adapted to allow a fluid to which suction is applied by the negative pressure to pass through, while preventing the member from entering the concave part; and a support member that is attached to the main body at one end of the support member, and supports the baffle plate main body at another end of the support member such that the baffle plate main body opposes the end face, and that supports the baffle plate main body such that a gap between the end face and the baffle plate main body is maintained, and a fluid path is formed that allows a fluid flowing out of the concave part to flow; and a gap maintaining part that is adapted to maintain the gap between the end face and the baffle plate main body; wherein the support member comprises a claw part that is adapted to be hooked on a surface of the main body, the surface being opposite the end face; the gap maintaining part and the claw part being adapted to hold the main body therebetween; and the gap maintaining part being adapted to form the fluid path.