Provided are gelling agent compositions capable of preparing gel compositions with good stability, which include a composition containing (A) at least one kind of N-acyl acidic amino acid dialkylamide represented by the formula (I):wherein each symbol is as described in the DESCRIPTION) and (B) fatty acid having 3 - 22 carbon atoms or fatty acid having 3 - 22 carbon atoms and higher alcohol having 8 - 22 carbon atoms or (E) N-acylamino acid, a composition containing (A) at least one kind of N-acyl acidic amino acid dialkylamide represented by the formula (I) and (B') a solvent having a boiling point of not more than 120°C and not more than 2 wt% of water, and a composition containing a particular N-acyl acidic amino acid dialkylamide at a particular ratio.
