Formula (1) [wherein J represents the following formulas J1, J2, J3, J4, J5 or J6, A1 represents a nitrogen atom or the like, A2 represents a nitrogen atom or the like, A3 represents a nitrogen atom or the like, A4 represents a nitrogen atom or the like, A5 represents a nitrogen atom or the like, B1 represents a nitrogen atom or the like, B2 represents a nitrogen atom or the like, B3 represents NR15 or the like, B4 represents a nitrogen atom or the like, B5 represents nitrogen B6 represents a nitrogen atom or the like, R1 represents a C1-C6 chain hydrocarbon group or the like which may have one or more atoms or groups selected from group X, R2 and R3 are The same or different and each represents a C1-C6 chain hydrocarbon group or the like which may have one or more atoms or groups selected from group X； R4 represents one or more atoms or groups selected from group W； Represents a C1-C6 chain hydrocarbon group and the like, which may have R5 and R6, Unlike one or phases, represents one or more atoms or groups of having optionally may C1-C6 chain hydrocarbon group selected from the group X or the like, n represents 0, 1 or 2. The condensed heterocyclic compound represented by the above has an excellent pest control effect.式（１）〔式中、Ｊは下式Ｊ１、Ｊ２、Ｊ３、Ｊ４、Ｊ５又はＪ６を表し、Ａ１は窒素原子等を表し、Ａ２は窒素原子等を表し、Ａ３は窒素原子等を表し、Ａ４は窒素原子等を表し、Ａ５は窒素原子等を表し、Ｂ１は窒素原子等を表し、Ｂ２は窒素原子等を表し、Ｂ３はＮＲ１５等を表し、Ｂ４は窒素原子等を表し、Ｂ５は窒素原子等を表し、Ｂ６は窒素原子等を表し、Ｒ１は群Ｘより選ばれる１個以上の原子若しくは基を有していてもよいＣ１－Ｃ６鎖式炭化水素基等を表し、Ｒ２及びＲ３は同一又は相異なり、群Ｘより選ばれる１個以上の原子若しくは基を有していてもよいＣ１－Ｃ６鎖式炭化水素基等を表し、Ｒ４は群Ｗより選ばれる１個以上の原子若しくは基を有していてもよいＣ１－Ｃ６鎖式炭化水素基等を表し、Ｒ５及びＲ６は同一又は相異なり、群Ｘより選ばれる１個以上の原子若しくは基を有していてもよいＣ１－Ｃ６鎖式炭化水素基等を表し、ｎは０、１又は２を表す。〕で示される縮合複素環化合物は優れた有害生物防除効果を有する。
