According to the present invention, a tetrazoyloxime derivative and a salt thereof, which are excellent in a control effect against plant disease injury, and a plant disease controlling agent containing the same as an active ingredient are provided. The tetrazoyloxime derivative has a structure represented by formula (1) shown below: wherein X represents a halogen atom, etc., n1 represents an integer of 0 to 5, A represents a group represented by formula (2) or (3), and Het represents a group represented by formula (4) or (5): wherein Y represents a C 1-8 alkyl group, R represents a halogen atom, etc., n2 represents an integer of 0 to 3, R 11 represents a halogen atom, etc., and Z or Z 11 represents a group represented by formula: Q 1 C(=O)NH-, etc. (in which Q 1 represents a C 2-8 haloalkenyl group, etc.)(depends on the kind of R or R 11 ) .
