Provided are: a novel nucleating agent capable of imparting excellent transparency to synthetic resins; a synthetic resin composition containing the same; and a molded object of the synthetic resin composition. The nucleating agent contains at least one triazine compound represented by Formula (1), wherein Ar
1
, Ar
2
and Ar
3
each independently represent an unsubstituted phenyl group or a substituted phenyl group. In Formula (1), for example, the number of substituents of the substituted phenyl group is preferably 1, and Ar
1
, Ar
2
and Ar
3
are preferably all different groups.
提供了一种新型成核剂,能够为合成
树脂赋予卓越的透明度;一种含有该成核剂的合成
树脂组合物;以及该合成
树脂组合物的成型物。该成核剂包含至少一种由式(1)表示的三嗪化合物,其中Ar1、Ar2和Ar3各自独立地表示未取代苯基或取代苯基。在式(1)中,例如,取代苯基的取代基数目最好为1,且Ar1、Ar2和Ar3最好都是不同的基团。