The present invention provides a vapor chamber that has: a housing wherein a first sheet and a second sheet are provided, and one main surface of the first sheet and one main surface of the second sheet are bonded to each other by facing each other, said housing having an internal space between the one main surface of the first sheet and the one main surface of the second sheet; an operating liquid sealed in the internal space of the housing; a wick that is disposed in the internal space of the housing; and a supporting body fixed to the first sheet at the outer end portion of the other main surface of the first sheet. In a plan view of the main surface of the first sheet, a part of the outer end of the supporting body is positioned outside of the outer end of the other main surface of the first sheet when viewed from a center portion of the housing.