A disulfide compound represented by formula (1): (in formula (1), R1 and R2 each independently represent a hydrogen atom or an alkyl group; R3 and R4 each independently represent a hydrogen atom or a substituent; Y represents a single bond, —CO— or —COO—; Rf represents a linear or branched perfluoroalkylene group having 1 to 20 carbon atoms or a linear or branched perfluoroether group having 1 to 20 carbon atoms; when Y is a single bond or —CO—, n represents 0 and m represents an integer of 0 to 6; when Y is —COO—, n represents 1 or 2 and m represents an integer of 1 to 6; and p represents an integer of 2 or 3 and 1 represents an integer of 0 or 1 such that p+1=3).