A plate-type refrigerant pipe comprising: a first plate made of stainless steel; a second plate made of stainless steel, joined to the first plate, and forming a refrigerant flow path together with the first plate; and a coupling pipe attached to the first plate and/or the second plate and to which an other refrigerant pipe is connected, wherein the coupling pipe is made of a material other than stainless steel and identical to a connected surface of the other refrigerant pipe, the first plate and/or the second plate includes a cylindrical portion formed in a cylindrical shape, a proximal end closer to a joining surface of the first plate and the second plate, a distal end further away from the joining surface, and a distal face being the end face of the cylindrical portion at the distal end, the coupling pipe is joined to an inner peripheral surface of the cylindrical portion, a first positioning mechanism that is in contact with an axial end of the cylindrical portion is formed on the outer peripheral surface of the coupling pipe to set a position of the coupling pipe in the pipe axis direction with respect to the cylindrical portion, and the first positioning mechanism includes a first projection provided on the outer peripheral surface of the coupling pipe, wherein the first projection is continuous over the entire circumference of the outer peripheral surface of the coupling pipe; or is provided in part of the circumferential direction on the outer peripheral surface of the coupling pipe; or is formed at a plurality of positions at intervals in the circumferential direction on the outer peripheral surface of the coupling pipe, and the first projection is in contact with the distal face. a first plate made of stainless steel; a second plate made of stainless steel, joined to the first plate, and forming a refrigerant flow path together with the first plate; and a coupling pipe attached to the first plate and/or the second plate and to which an other refrigerant pipe is connected, wherein the coupling pipe is made of a material other than stainless steel and identical to a connected surface of the other refrigerant pipe, the first plate and/or the second plate includes a cylindrical portion formed in a cylindrical shape, a proximal end closer to a joining surface of the first plate and the second plate, a distal end further away from the joining surface, and a distal face being the end face of the cylindrical portion at the distal end, the coupling pipe is joined to an inner peripheral surface of the cylindrical portion, a first positioning mechanism that is in contact with an axial end of the cylindrical portion is formed on the outer peripheral surface of the coupling pipe to set a position of the coupling pipe in the pipe axis direction with respect to the cylindrical portion, and the first positioning mechanism includes a first projection provided on the outer peripheral surface of the coupling pipe, wherein the first projection is continuous over the entire circumference of the outer peripheral surface of the coupling pipe; or is provided in part of the circumferential direction on the outer peripheral surface of the coupling pipe; or is formed at a plurality of positions at intervals in the circumferential direction on the outer peripheral surface of the coupling pipe, and the first projection is in contact with the distal face.