Method of electrically connecting element to wiring, method of producing light-emitting element assembly, and light-emitting element assembly

A method of electrically connecting an element to wiring includes the steps of forming a conductive fixing member precursor layer at least on wiring provided on a base; and arranging an element having a connecting portion on the wiring such that the connecting portion contacts the conductive fixing member precursor layer, and then heating the conductive fixing member precursor layer to form a conductive fixing member latter, thereby fixing the connecting portion of the element to the wiring, with the conductive fixing member layer therebetween, wherein the conductive fixing member precursor layer is composed of a solution-tape conductive material.