Electric component box and extreme ultraviolet light generation apparatus

An extreme ultraviolet light generation apparatus comprising:

• an extreme ultraviolet light generation chamber device configured to generate plasma by irradiation of a target substance with laser light;
• and
• an electric component box for accommodating an electric component to be connected to an electric component of the extreme ultraviolet light generation chamber device,
• the electric component box comprising:
• a first box into which a wiring from the extreme ultraviolet light generation chamber device is introduced and which is capable of being fixed to a placement surface;
• a second box into which a wiring from the first box is introduced and which is capable of being switched, by being raised and lowered, between a fixed state of being fixed to the placement surface and a movable state of being movable on the placement surface;
• and
• a connection device providing connection between the first box and the second box as allowing the second box to be rotatable with respect to the first box, from a facing state in which a predetermined side wall of the first box and a predetermined side wall of the second box face each other, in a direction in which the predetermined side wall of the first box and the predetermined side wall of the second box move away from each other from the facing state, and to be capable of being raised and lowered with respect to the first box.