1. An electric power conversion apparatus comprising:a terminal block for connecting a conductive member, the terminal block including:
a movable fastener that switches by movement between a first state and a second state, the first state being a state of holding the conductive member connected with the terminal, the second state being a state of releasing the conductive member;
a storage that accommodates at least a part of the movable fastener in at least one of the first state and the second state, the storage comprising an outer wall facing the movable fastener in a direction crossing a movable direction of the movable fastener in a state where the storage accommodates the part of the movable fastener: and
a vent hole that is provided in the outer wall of the storage.