There is provided a novel agent for controlling harmful arthropods or nematodes that are parasites and hygienic pests for animals. An ecto- or endo-parasiticide for mammals or the like comprising as active ingredient, one or more selected from substituted benzamide compounds of formula (1) or salts thereof: wherein A1 is C—X3 or nitrogen atom, etc., A2 and A3 are C—H, etc., A4 is C—H or nitrogen atom, etc., G is G-2a, etc., W is oxygen atom or sulfur atom, X1 is halogen atom, trifluoromethyl, etc., X2 is hydrogen atom, halogen atom, trifluoromethyl, etc., X3 is hydrogen atom, halogen atom, etc., Y1 is hydrogen atom, halogen atom, methyl, etc., R1 is trifluoromethyl, etc., R2 is E-3a, etc., R3 is hydrogen atom, etc., p is an integer of 0 to 2.