OUTDOOR UNIT FOR AIR CONDITIONER

An outdoor unit capable of promptly discharging dew condensation water dropped from a heat exchanger to an exterior is provided. A drainage port (42, 44) is formed in a bottom frame (26) of an outdoor unit (2) below a heat exchanger (13). A base leg (40) of the bottom frame (26) is formed to have a U shape section by upper plates (51b, 52b) abutted with a lower surface of the bottom frame (26), lower plates (51a, 52a) fixed to an installment surface (G), and standing plates (51c, 52c) connecting the upper plates (51b, 52b) and the lower plates (51a, 52a), and further includes a first part (51) and a second part (52) with respect to the longitudinal direction. The first part (51) is formed to have a U shape section opening outward in the horizontal direction with the lower plate (51a) thereof being fixed to the installment surface (G). The second part (52) is provided at least at a position corresponding to the drainage port (42, 44) with respect to the longitudinal direction of the base leg (40), and formed to have a U shape section opening inward in the horizontal direction, the second part having a structure where the upper plate (52b) thereof avoids a lower region of the drainage port (42, 44).