<；P>；PROBLEM TO BE SOLVED: To provide a new aluminum complex hydroxide salt which is suitably used as a compounding agent for resins, particularly exerts excellent heat-retaining property and excellent transparency when blended in an agricultural film as a heat-retaining agent. <；P>；SOLUTION: The aluminum complex hydroxide salt has Al hydroxide octahedral layers and bivalent anions between the octahedral layers. The bivalent anions contain at least an aluminosilicate type anion represented by formula (1): [Na<；SB>；p<；/SB>；Al<；SB>；q<；/SB>；Si<；SB>；r<；/SB>；O<；SB>；z<；/SB>；]<；SP>；2-<；/SP>；, wherein p, q, r and z are each a positive number satisfying 5&le；z&le；20, z=(p/2)+(3q/2)+2r+1, 0<；p/q<；1, and 0.01&le；q/r&le；1. <；P>；COPYRIGHT: (C)2008,JPO&INPIT
