A cold working lubricant for metallic conduits in the form of a liquid wherein butyl acrylate ester-methyl methacrylate ester copolymer of 10-40 in resin acid value and -10 DEG to 20 DEG C. in glass transition temperature is emulsified and dispersed; an emulsified product of the straight chain saturated fatty acid or its ester with a melting point of 30 DEG -70 DEG C. can be further added thereto.
