Magnetic recording medium and magnetic recording medium composition

A magnetic recording medium,

• which comprises a magnetic layer comprising ferromagnetic powder and binder on a nonmagnetic support, wherein:
• the magnetic layer further comprises a fatty acid ester and a polyester resin with a number average molecular weight of greater than or equal to 1,000 but less than 20,000;
• the polyester resin comprises a structural unit derived from a polyvalent carboxylic acid and a structural unit derived from a polyol, as well as 10 mol % to 50 mol % of a structural unit, derived from a cyclic polyvalent carboxylic acid selected from the group consisting of an alicyclic polyvalent carboxylic acid and an aromatic polyvalent carboxylic acid, per 100 mol % of a combined total of the structural unit derived from the polyvalent carboxylic acid and the structural unit derived from the polyol;
• and
• the polyester resin comprises one or more partial structures selected from the group consisting of a partial structure denoted by formula 1 and a partial structure denoted by formula 2 below:
• wherein each of L1 in formula 1 and L2 in formula 2 independently denotes a divalent connecting group, and each of Z1 in formula 1 and Z2 in formula 2 independently denotes a monovalent group denoted by —OM or a monovalent group denoted by —O−A+, with M denoting a hydrogen atom or an alkali metal atom, A+ denoting an ammonium cation, and * denoting a bond position with another partial structure constituting the polyester resin.