To miniaturize a liquid receiver-incorporated refrigerant condenser by increasing a ventilation amount for cooling a liquid receiver to promote liquefaction of a gas-phase refrigerant inside the liquid receiver.

In this ventilation structure, a first guide 20 forming a ventilation passage L between the guide 20 and the liquid receiver 13, and a second guide 30 blocking a condensation part cooling air A from an inflow portion of a liquid receiver cooling air B of flow passages of a blast fan 8 are installed beside the liquid receiver 13. Thereby, because air C flowing through the inflow portion of the liquid receiver cooling air B of the flow passages of the blast fan 8 almost becomes the liquid receiver cooling air B, cooling of the liquid receiver 13 is promoted to promote the liquefaction of the gas-phase refrigerant inside the liquid receiver 13. Accordingly, capacity of a condensation part 10a and the liquid receiver 13 is reduced to miniaturize the liquid receiver- incorporated refrigerant condenser 1.