To obtain the subject cleaner satisfying requisite performances such as for environmental protection, odor and ignitability, and excellent in cleanup power against adhesives and protective films as well as petroleum-based pitch, comprising a hydrocarbon-based solvent and a specific compound.

This industrial cleaner for lens comprises (A) pref. 50-80wt.% of a 6-30C hydrocarbon-based solvent with a flash point of pref. ≥70°C (e.g. dodecylbenzene, hexadecane) and (B) 20-50wt.% of a compound of the formula R1COO-(AO)n-R2 (R1 is a 1-2C alkyl; R2 is a 1-8C alkyl; A is a 2-3C alkylene; (n) is 1-5) (e.g. diethylene glycol monomethyl ether, dipropylene glycol monobutyl ether acetate), and pref. furthermore, 3-20wt.% of a nonionic surfactant (pref. of polyethylene glycol ether type with a HLB number of 10-15).