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 (F) 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 (M) of the first plate and the second plate , a distal end further away from the joining surface (M), 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 (F) 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 (M) of the first plate and the second plate , a distal end further away from the joining surface (M), 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 . <EOS>