An electric wire protection cover structure includes an electric wire housing part in which an electric wire is inserted through an opening and housed, an electric wire protection cover that closes the opening, a hinge part that moves the electric wire protection cover relative to the opening between an open position and a closed position, a regular locking mechanism that locks the electric wire protection cover to the electric wire housing part at the closed position where the opening is closed, and a temporary locking mechanism that locks the electric wire protection cover to the electric wire housing part at the open position where the opening is not closed.