The present disclosure provides a connector capable of improving dissipation performance while suppressing enlargement. A connector 10 includes a connector housing 11 and terminals T to be accommodated into the connector housing 11 and electrically connected to a mating device. The connector housing 11 includes upper slope portions 41a, 41b inclined with respect to a horizontal direction at positions vertically above the terminals T in a state mounted on the mating device. Breathable upper breathable films 44a are provided in upper through holes 43a, 43b provided in the upper slope portions 41a, 41b.