Condensed heterocyclic compound and pest control agent

Provided is a novel pest control agent, particularly a pesticide or a miticide. A condensed heterocyclic compound represented by formula (1), a salt of the compound, or an N-oxide of the compound or the salt. [Q represents a structure represented by Q1, Q2 or the like; D substituted by -S(O) n R 1 represents a structure represented by D1 or D2; A 1 represents N(A 1a ) or the like; A 1a represents a C 1 -C 6 alkyl group or the like; A 4 represents a nitrogen atom or C(R 4 ); A 5 represents a nitrogen atom or C(R 5 ); R 1 represents a C 1 -C 6 alkyl group or the like; R 2 , R 5 and R 6 independently represent a hydrogen atom or a C 1 -C 6 alkyl group; R 3 , R 4 , Y 1 , Y 2 , Y 3 and Y 4 independently represent a halogen atom, a halo(C 1 -C 6 )-alkyl group or the like; and n represents an integer of 0, 1 or 2.]