Abstract: A temporary joist hanger for use in the construction of a deck extending outwardly from the side of a building comprising a generally flat, horizontally disposed upper end portion having a generally flat, vertically disposed base portion extending downwardly from the outer end thereof. A generally flat side wall portion extends transversely from one of the side edges of the base portion. A joist support extends from the side wall portion for temporarily supporting one end of a joist therein. The joist support is selectively vertically adjustably mounted on the side wall portion to accommodate joists of different widths. The method of constructing a deck utilizing the temporary joist hanger is also described.