To provide a vehicular air conditioning unit capable of preventing dew condensation in a case body by certainly draining water from a drain hole without leaving drain water generated from an evaporator to an inside wall of the case body.

The vehicular air conditioning unit 1 is equipped with: the evaporator 2 for cooling blown air; an air blowing space 12 formed at an upper stream side of the evaporator 2; a draining space 13 formed below the evaporator 2; the case body 3 including a drain hole 5; a drain water circulating space 8 surrounded by a lower peripheral wall 9 of an inner guide 4 for guiding the drain water generated from the evaporator 2 to the drain hole 5; a drain guide part 6 formed extending from the lower peripheral wall 9 to the drain hole 5; and an evaporator support part 7 for supporting the evaporator 2 above the drain water circulating space 8. The lower peripheral wall 9 is formed continuously with the drain guide part 6. The drain guide part 6 and the lower peripheral wall 9 have no contact with the case body 3.

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