An opening/closing member opening/closing apparatus comprising: an operation handle that includes a first section, which is thick in a normal direction to a surface on the front side of the operation handle and in which a turning shaft is disposed, and a grip section formed in a second section which is thinner than the first section in the normal direction to the surface on the front side, that is configured to be supported in a turning manner by a base member configured to be disposed in an opening/closing member, and that is able to shift between an accommodated position, at which the grip section is in a state of being accommodated in an accommodation section formed in the base member, and a projecting position, at which the grip section is in a state of projecting from the accommodation section; a first sensor section configured to detect an operation through which the opening/closing member enters into an unlocked state and that is disposed in the grip section; and a second sensor section configured to detect an operation through which the opening/closing member enters into a locked state and that is disposed in the operation handle so as not to be overlapped with the grip section in a side view in the normal direction to the surface on the front side of the operation handle, characterized in that the distance between a boundary between the grip section and the first section, and the second sensor section is equal to or greater than 30 mm, and configured so that, when the operation handle is set at the projecting position, at least a part of the second sensor section is positioned in the accommodation section. an operation handle that includes a first section, which is thick in a normal direction to a surface on the front side of the operation handle and in which a turning shaft is disposed, and a grip section formed in a second section which is thinner than the first section in the normal direction to the surface on the front side, that is configured to be supported in a turning manner by a base member configured to be disposed in an opening/closing member, and that is able to shift between an accommodated position, at which the grip section is in a state of being accommodated in an accommodation section formed in the base member, and a projecting position, at which the grip section is in a state of projecting from the accommodation section; a first sensor section configured to detect an operation through which the opening/closing member enters into an unlocked state and that is disposed in the grip section; and a second sensor section configured to detect an operation through which the opening/closing member enters into a locked state and that is disposed in the operation handle so as not to be overlapped with the grip section in a side view in the normal direction to the surface on the front side of the operation handle, characterized in that the distance between a boundary between the grip section and the first section, and the second sensor section is equal to or greater than 30 mm, and configured so that, when the operation handle is set at the projecting position, at least a part of the second sensor section is positioned in the accommodation section.