A terminal mounting construction includes a housing and a terminal. The housing accommodates a substrate and including a locking portion. The terminal connects the substrate to an electric wire. The terminal includes a conductive portion, a substrate connecting terminal portion, a wire connecting portion and a locked portion. The conductive portion is connected to a pattern on the substrate. The substrate connecting terminal portion holds the substrate together with the conductive portion. The wire connecting portion is connected to the electric wire from an opposite direction to an inserting direction in which the substrate is inserted between the conductive portion and the substrate connecting terminal portion. The locked portion is locked in the locking portion. The housing includes an accommodating portion accommodating the substrate connecting terminal portion so as to receive an end face of the substrate connecting terminal portion which faces to follow the opposite direction.