To provide a housing case of on-vehicle electronic equipment capable of suppressing attachment of condensation dew drops on a surface or the like of a print board 11 arranged in an inside of a case body 1 by effectively absorbing and eliminating both of moisture and condensation dew drops.

Moisture absorbents 5, 7, 8 capable of absorbing both of the moisture in the air and droplets are provided, the moisture absorbents 5, 7, 8 are arranged in a periphery of the inside of the case body 1, and both of the moisture in the periphery of the inside of the case body 1 and the droplets which are generated by dew condensation in the periphery of the inside of the case body 1. That is, the moisture absorbents are arranged in the inside of a limited vent hole 3 as the periphery of the inside of the case body 1 and a part which covers an inner wall surface 1bb of the case body 1 in a proximal position of an opening 3b or the like. Thereby both of the moisture and condensation dew drops in the periphery of the inside of the case body 1 are effectively absorbed, and the attachment of the condensation dew drops on the print board 11 housed in the inside of the case body 1 and an electronic component 10 mounted on the print board 11 is suppressed.