PLATE-TYPE HEAT EXCHANGER

[Object] To provide a plate type heat exchanger which can maintain high heat transfer efficiency, can be cleaned easily and can be made compact in configuration by making an inlet and an outlet for at least one fluid large while allowing a heat transfer surface to maintain a large area. [Solving means] A plate type heat exchanger 10 includes: a large number of plates 100 formed by arranging plates each having concave and convex portions 120, 130 parallel to each other; and a large number of spacers 200, 300 sandwiched between the large number of plates 100, wherein the spacers 200, 300 include: the first spacers 200 where the first spacers 200 which are disposed on edges of a plate surface of the plate with a predetermined distance therebetween form a first flow passage in cooperation with the plate surface; and the second spacers 300 where the second spacers 300 which are disposed on edges of a plate surface of the plate with a predetermined distance therebetween form a second flow passage having an inlet and an outlet which differ in direction from the first flow passage in cooperation with the plate surface, and the first spacers 200 and the second spacers 300 are alternately arranged between the large number of plates 100.