To prevent the air leakage above and below a liquid receiver without special additional parts.

For a refrigerant condenser 10, the liquid receiver 20 is joined integrally with a header tank 12, and also the liquid receiver 20 is constituted of a cylindrical tank body 20a and cap members 20b and 20c to plug the opening ends of this tank body 20a. In this case, air leakage preventive plates 20d to prevent cooling air from passing through the space A are molded integrally in these cap members 20b and 20c, fixing eyes upon the point that the cap members 20b and 20c face the upper and lower spaces A of the liquid receiver 20.