A composition of a silver-conjugated compound composite containing (1) a silver-conjugated compound composite containing a silver particle with a Feret diameter of 1,000 nm or less and a conjugated compound having a weight average molecular weight of 3.0×102 or more being adsorbed to the silver particles and (2) an ionic compound. The ionic compound may be a compound having a structure represented by the following Formula (hh-1): [Chem. 1] Mm′+aX′n′−b  (hh-1) wherein Mm′+ represents a metal cation, X′n′− represents an anion, a and b each independently represent an integer of 1 or more, and when Mm′+ and X′n′− are each plurally present, they may be the same as or different from each other.