A clip comprising: a clip main body, wherein the clip main body includes a pair of locking pawls which are deformable in a direction in which the locking pawls approach each other and a seating portion, the pair of locking pawls has internal side faces opposed to each other, shank portions which are connected to the seating portion and extend in a direction in which the shank portions leave the seating portion, pawl portions which are connected to the shank portions and extend in a direction in which the locking pawls leave the seating portion, and protrusion portions including inclined faces which are inclined relative to a clip central axial line, a projection/recess is provided on at least part of the internal side faces of the pair of locking pawls, the projection/recess being a comb-like projection/recess that extends along the clip axial direction and has a plurality of projection portions and a plurality of recess portions, the projection/recess extending in the clip axial direction, the projection/recess of the locking pawl on one side and the projection/recess of the locking pawl on the other side are shifted with respect to each other such that the projection portions of the projection/recess of the locking pawl on the one side are opposed to the recess portions of the projection/recess of the locking pawl on the other side and the recess portions of the projection/recess of the locking pawl on the one side are opposed to the projection portions of the projection/recess of the locking pawl on the other side, the pair of locking pawls falls down in a direction in which both of them approach each other, the projection portions of the locking pawl on one side are received by the recess portions of the locking pawl on the other side, the clip further comprises a lock pin, wherein the lock pin has side faces, a space is provided between the internal side faces of the pair of locking pawls and the lock pin can be inserted into the space, and wherein when the lock pin is inserted into the space, front end faces of the projection portions on the internal side faces of the pair of locking pawls contact the side faces of the lock pin to inhibit the pair of locking pawls from being deformed in a direction in which the locking pawls approach each other, characterized in that the projection/recess is formed on at least part of the shank portions and at least part of the pawl portions of the pair of locking pawls, and a projection/recess portion having projection portions which rush in the recess portions formed in the shank portions of the locking pawls, when the lock pin is inserted into the space, is formed at a portion of the lock pin corresponding to the shank portions of the locking pawls. a clip main body, wherein the clip main body includes a pair of locking pawls which are deformable in a direction in which the locking pawls approach each other and a seating portion, the pair of locking pawls has internal side faces opposed to each other, shank portions which are connected to the seating portion and extend in a direction in which the shank portions leave the seating portion, pawl portions which are connected to the shank portions and extend in a direction in which the locking pawls leave the seating portion, and protrusion portions including inclined faces which are inclined relative to a clip central axial line, a projection/recess is provided on at least part of the internal side faces of the pair of locking pawls, the projection/recess being a comb-like projection/recess that extends along the clip axial direction and has a plurality of projection portions and a plurality of recess portions, the projection/recess extending in the clip axial direction, the projection/recess of the locking pawl on one side and the projection/recess of the locking pawl on the other side are shifted with respect to each other such that the projection portions of the projection/recess of the locking pawl on the one side are opposed to the recess portions of the projection/recess of the locking pawl on the other side and the recess portions of the projection/recess of the locking pawl on the one side are opposed to the projection portions of the projection/recess of the locking pawl on the other side, the pair of locking pawls falls down in a direction in which both of them approach each other, the projection portions of the locking pawl on one side are received by the recess portions of the locking pawl on the other side, the clip further comprises a lock pin, wherein the lock pin has side faces, a space is provided between the internal side faces of the pair of locking pawls and the lock pin can be inserted into the space, and wherein when the lock pin is inserted into the space, front end faces of the projection portions on the internal side faces of the pair of locking pawls contact the side faces of the lock pin to inhibit the pair of locking pawls from being deformed in a direction in which the locking pawls approach each other, characterized in that the projection/recess is formed on at least part of the shank portions and at least part of the pawl portions of the pair of locking pawls, and a projection/recess portion having projection portions which rush in the recess portions formed in the shank portions of the locking pawls, when the lock pin is inserted into the space, is formed at a portion of the lock pin corresponding to the shank portions of the locking pawls.