Among these, a phenyl group and naphthyl group are more preferable.Furthermore, non-ionic infrared absorbing agents represented by the following IRN-1 to IRN-9 can be also preferably used. ##STR164## ##STR165##Among the above-mentioned compounds, examples of the particularly preferable anionic infrared absorbing agent include IRA-1, as the cationic infrared absorbing agents, IRC-7, IRC-30, IRC-40