The present invention relates to a method for ensuring the end part continuity of a steel wire of a truss deck and to a method for reducing the sagging amount during the construction of steel wire truss generated before the concrete poured in a truss deck is cured and then consequentially omitting a temporary support by seriating the end part of a steel wire truss before the concrete is poured. The present invention suggests a common method of making an upper steel wires (11) of steel wire trusses on the right and left to be applied with tensile force by seriated by a turn buckle (30), and making a lower steel wire (12) to ensure continuity by holding a truss deck in the upper part of the upper flange (51) of a steel beam and suggests a method in a case where a truss deck is held on a putting jaw (53) so that the a part of slab thickness goes lower than the upper flange. The common method is to replace a shear connection member by welding a ��shaped piece on the lower steel wire and welding the ��shaped piece to the upper flange of a steel beam. The putting jaw (53) hold method relates to a method for ensuring the end part continuity of a steel wire of a truss deck making a compressive stress to be transferred before concrete is cured and being acted as a shear connection material by directly and closely spacing one side of the ��shaped steel piece welded on the lower steel wire to a web and then closely spacing the ��shaped steel piece on the other side to a web by controlling the coupling of a spacer bolt (41). [Reference numerals] (AA) Welding