Provided is a novel noxious organism control agent, particularly an insecticide or a miticide. A condensed heterocyclic compound represented by formula (1) [wherein D substituted by -S(O)nR1 represents a ring represented by D1, D2 or D3 Q represents a ring represented by Q1, Q2, Q3 or Q4 R1 represents a (C1-C6) alkyl group, a C2-C6 alkenyl group, a C2-C6 haloalkenyl group, a C2-C6 alkynyl group, a C2-C6 haloalkynyl group, a C3-C6 cycloalkyl group, a C3-C6 halocycloalkyl group, a C3-C6 cycloalkyl-(C1-C6) alkyl group, a C3-C6 halocycloalkyl-(C1-C6) alkyl group or a hydroxy-(C1-C6) alkyl group each of which is optionally substituted by a C1-C6 alkyl group, a C1-C6 haloalkyl group or R1a R1a represents a C1-C8 alkoxycarbonyl group and n represents an integer of 0, 1 or 2], a salt of the condensed heterocyclic compound, or an N-oxide of the condensed heterocyclic compound or the salt.Proporcionar nuevos plaguicidas, en especial insecticidas o acaricidas un compuesto heterocíclico condensado representado por la fórmula (1) o su sal o su N-óxído: (ver Fórmula) donde D sustituido con -S(O)nR1 es un anillo representado por cualquiera de D1, D2 y D3, Q es un anillo representado por cualquiera de Q1, Q2, Q3 y Q4, R1 es alquilo C1-C6, haloalquilo C1-C6, alquilo (C1-C6) opcionalmente sustituido con R1a, alquenilo C2-C6, haloalquenilo C2-C6, alquinilo C2-C6, haloalquinilo C2-C6, cicloalquilo C3-C6, halocicloalquilo C3-C6, cicloalquil C3-C6-alquilo (C1-C6), halocicloalquil C3-C6-alquilo (C1-C6)o hidroxialquilo (C1-C6), R1a es alcoxi C1-C8-carbonilo y n es un número entero de 0, 1 ó 2.
