A case configured to accommodate a controller, the controller including: a first main surface; a second main surface provided on a side opposite to the first main surface; a first side surface and a second side surface provided on both ends in a longer direction of the first main surface and the second main surface; and a first side end surface and a second side end surface provided on both ends in a shorter direction of the first main surface and the second main surface, the controller further including: a first operation portion provided on the first main surface; a second operation portion provided on the first side end surface; a third operation portion provided on the second main surface; and an image capturing section provided on the second side end surface, the case comprising: a case main body portion having an accommodating space in which the controller can be accommodated; at least one protruding portion protruding from the case main body portion, and a movable member disposed at a position opposing an operation button included on the second operation portion when the controller is accommodated in the accommodating space, wherein the case main body portion is formed into a lengthwise shape including: a first end portion configured to face the first side end surface of the controller when the controller is accommodated in the accommodating space; and a second end portion configured to face the second side end surface of the controller when the controller is accommodated in the accommodating space, characterized in that the case main body portion is provided with: a first opening portion that is provided on the second end portion side and is for allowing image capture of the outside of the case main body portion by the image capturing section when the controller is accommodated in the accommodating space; a second opening portion (67, 671) from which at least part of the first operation portion is exposed when the controller is accommodated in the accommodating space; and a third opening portion from which at least part of the third operation portion is exposed when the controller is accommodated in the accommodating space, the protruding portion is disposed on the first end portion side with respect to the third opening portion, and the movable member includes: a first region that can be operated by a user; and a second region that can press the operation button of the second operation portion in response to the operation on the first region when the controller is accommodated in the accommodating space. a case main body portion having an accommodating space in which the controller can be accommodated; at least one protruding portion protruding from the case main body portion, and a movable member disposed at a position opposing an operation button included on the second operation portion when the controller is accommodated in the accommodating space, wherein the case main body portion is formed into a lengthwise shape including: a first end portion configured to face the first side end surface of the controller when the controller is accommodated in the accommodating space; and a second end portion configured to face the second side end surface of the controller when the controller is accommodated in the accommodating space, a first end portion configured to face the first side end surface of the controller when the controller is accommodated in the accommodating space; and a second end portion configured to face the second side end surface of the controller when the controller is accommodated in the accommodating space, the case main body portion is provided with: a first opening portion that is provided on the second end portion side and is for allowing image capture of the outside of the case main body portion by the image capturing section when the controller is accommodated in the accommodating space; a second opening portion (67, 671) from which at least part of the first operation portion is exposed when the controller is accommodated in the accommodating space; and a third opening portion from which at least part of the third operation portion is exposed when the controller is accommodated in the accommodating space, a first opening portion that is provided on the second end portion side and is for allowing image capture of the outside of the case main body portion by the image capturing section when the controller is accommodated in the accommodating space; a second opening portion (67, 671) from which at least part of the first operation portion is exposed when the controller is accommodated in the accommodating space; and a third opening portion from which at least part of the third operation portion is exposed when the controller is accommodated in the accommodating space, the protruding portion is disposed on the first end portion side with respect to the third opening portion, and the movable member includes: a first region that can be operated by a user; and a second region that can press the operation button of the second operation portion in response to the operation on the first region when the controller is accommodated in the accommodating space.