A compound type heat exchanger has a core part including a plurality of heat exchanging pipes and fins juxtaposed and alternately stacked into a lamination, in common. At both ends of the lamination in the longitudinal direction of the pipes, they are connected with header pipes. A pseudo heat exchanging passage member having a substantially Z-shaped section is arranged in place of a specified heat exchanging tube of the heat exchanging tubes and a fin adjoining the specified heat exchanging tube. The pseudo heat exchanging passage member is formed so as not to allow passage of the heat exchanging medium. At the boundary of the pseudo heat exchanging passage member, the core part is divided into two parts in the laminating direction, defining an oil cooler unit on one hand and a condenser unit on the other hand. Owing to the provision of the pseudo heat exchanging passage member in the core part, heat conduction from the oil cooler unit to the condenser unit can be suppressed.