To provide a novel gelling agent capable of forming a gel by a simpler method.SOLUTION:General formula [I]Embedded image (Wherein R1Represents an aliphatic group having 1 to 30 carbon atoms which may have a substituent. )An alkylamide compound represented by the general formula [II]Embedded image (Wherein R2Represents an aliphatic group having 1 to 30 carbon atoms which may have a substituent. ), And exhibits thixotropy in the formed gel.(FIG. 10)【課題】より簡易な手法でゲル形成可能な新規なゲル化剤を提供すること。【解決手段】一般式[I]【化1】(式中、R1は置換基を有していても良い炭素原子数1乃至30の脂肪族基を表す。)で表されるアルキルアミド化合物、又は一般式[II]【化2】(式中、R2は置換基を有していても良い炭素原子数1乃至30の脂肪族基を表す。)で表されるアルキルウレア化合物を2種以上含み、形成したゲルにおいてチキソトロピー性を発現する、ゲル化剤。【選択図】図10