An endoscope cap comprising: a cylindrical hood portion that can be attached to an outer circumferential surface of a distal end portion of an endoscope; a cap portion that is connected to a distal end of the hood portion, wherein the cap portion or the hood portion has an abutting surface against which a distal end of the endoscope is abutted in a state in which the distal end portion of the endoscope is inserted into the hood portion, and wherein the cap portion protrudes from the distal end of the hood portion in a longitudinal direction of the hood portion; a channel tube into which an elongated device can be inserted, wherein a distal end portion of the channel tube is fixed to a proximal end portion of the hood portion, and that extends substantially parallel to a longitudinal axis of the hood portion; and a linear coupling member; wherein a distal end of the channel tube is located closer to a proximal end of the hood portion than the abutting surface is, characterized in that the linear coupling member is for coupling the elongated device with the hood portion, the linear coupling member being supported by the hood portion and extending along an outer circumferential surface of the hood portion, the hood portion has a pair of support holes that are provided at positions separated from each other in a circumferential direction of the hood portion, and into which the linear coupling member is inserted from an outside toward an inside of the hood portion, the linear coupling member is pivotable with respect to the hood portion, with the individual support holes serving as fulcrums, and the pair of support holes are formed at positions closer to the proximal end of the hood portion than the abutting surface is and also closer to the distal end of the hood portion than the distal end of the channel tube. a cylindrical hood portion that can be attached to an outer circumferential surface of a distal end portion of an endoscope; a cap portion that is connected to a distal end of the hood portion, wherein the cap portion or the hood portion has an abutting surface against which a distal end of the endoscope is abutted in a state in which the distal end portion of the endoscope is inserted into the hood portion, and wherein the cap portion protrudes from the distal end of the hood portion in a longitudinal direction of the hood portion; a channel tube into which an elongated device can be inserted, wherein a distal end portion of the channel tube is fixed to a proximal end portion of the hood portion, and that extends substantially parallel to a longitudinal axis of the hood portion; and a linear coupling member; wherein a distal end of the channel tube is located closer to a proximal end of the hood portion than the abutting surface is, characterized in that the linear coupling member is for coupling the elongated device with the hood portion, the linear coupling member being supported by the hood portion and extending along an outer circumferential surface of the hood portion, the hood portion has a pair of support holes that are provided at positions separated from each other in a circumferential direction of the hood portion, and into which the linear coupling member is inserted from an outside toward an inside of the hood portion, the linear coupling member is pivotable with respect to the hood portion, with the individual support holes serving as fulcrums, and the pair of support holes are formed at positions closer to the proximal end of the hood portion than the abutting surface is and also closer to the distal end of the hood portion than the distal end of the channel tube.