Provided is a pest control composition comprising an iminopyridine derivative represented by the following formula (I) and at least one other pest control agent: embedded image wherein Ar is An optionally substituted 5-6 membered heterocycle, A represents a heterocycle having a 5-10 membered unsaturated bond containing one or more nitrogen atoms, R adjacent to the nitrogen atom present on the ring； A group having an imino group substituted, Y represents hydrogen, halogen or the like； R represents a group represented by the following formulas (a) to (e), (y) and (z): Indicate any].下記式（Ｉ）で示されるイミノピリジン誘導体と、他の有害生物防除剤の少なくとも１種とを含有してなる、有害生物防除用組成物を提供する：【化１】［式中、Ａｒは置換されてもよい５－６員のヘテロ環、Ａは窒素原子を１つ以上含む５－１０員の不飽和結合を有するヘテロ環を示し、環上に存在する窒素原子の隣接位に、Ｒ基に置換されたイミノ基を有し、Ｙは水素、ハロゲン等を示し、Ｒは、以下の式（ａ）～（ｅ）、（ｙ）及び（ｚ）で示される基、【化２】のいずれかを示す］。
