to c22 a c16 to c22 b c8 to c10 content of 0 5 to give a fat composition 48 parts having a b c8 to c10 b c8 to c10 b c8 to c10 content of 5 6 an a c16 to c22 b c8 to c10 b c8 to c10 content of 67 4 an a c16 to c22 a c16 to c22 b c8 to c10 content of 22 9 and an a c16 to c22 a c16 to c22 a c16 to c22 content of 2 1 based on the whole fat composition the obtained fat composition had an a c18 b c8 to c10 b c8 to c10 content of 66 5 and an a c18 a c18 b c8 to 10 content of 21 3 based on the whole fat composition a modifying agent for a plastic fat as a fat composition composed of a mixture of an abb type triglyceride as a c16 to c22 b c8 b c8 in which a was stearic acid c18 palmitic acid c16 arachidic acid c20 or behenic acid c22 and b was caprylic acid c8 and an aab type triglyceride as a c16 to c22 a c16 to c22 b c8 in which a is stearic acid c18 palmitic acid c16 arachidic acid c20 or behenic acid c22 and b was caprylic acid c8 was prepared as follows to.