Magnetic recording medium

A magnetic recording medium comprising a non-magnetic support having provided thereon a magnetic layer containing ferromagnetic fine particles dispersed in a binder including a polyurethane resin, wherein the number average molecular weight of said polyurethane resin is from 40,000 to 100,000, containing (1) as a main polymer chain a polyester polyol containing alcoholic and acid components comprising at least one of (A) at least one alcoholic component selected from alicyclic divalent alcohol and aromatic divalent alcohol in an amount of 50 mol% or more based on the total amount of alcoholic components or (B) at least one acid component selected from alicyclic dicarboxylic acid and aromatic dicarboxylic acid in an amount of 50 mol% or more based on the total amount of acid components, and (2) at least one polyisocyanate selected from tolylene diisocyanate, diphenyl-methane-4,4'-diisocyanate, isophrorone diisocyanate, dicyclohexylmethane-4,4'-diisocyanate, and p-phenylene diisocyanate in an amount of 5 mol% or more based on the total amount of all alcoholic components and all acid components, and further containing (3) a polar group selected from --SO.sub.3 M, --CO.sub.2 M, and --PO.sub.3 M.sub.2, wherein M represents an H, Na, or K atom, in an amount of from 0.05 to 1.5 wt% based on the total amount of the polyurethane resin.