PURPOSE: To prepare the cleaning agent free from fluorocarbon which does not harm environments and shows improved cleaning performance by incorporating a specific carrier compound, a N-alkyl-lactam or a dihydro-2(3H)-furanone and a polypropylene glycol ether.

CONSTITUTION: The cleaning agent is prepared by incorporating, as a carrier compound, a dipropylene glycol monoether of the formula I (R1 is 1-6C carbon- chain) with 30-70 wt.% of a N-alkyl lactam of formula II (R2 is 1-10C carbon- chain) or 30-70 wt.% of dihydro-2(3H)-furanone and with 10-30 wt. % of a polypropylene glycol ether of the formula III (R3 is 1-6C carbon-chain; R4 is H or 1-6C carbon-chain).