The present invention contains as an active ingredient one or more rhodanine compound represented by the following general formula (1), to provide a positively chargeable charge control agent.
[Formula 1]

[Wherein, R ₁ represents a hydrogen atom or the like, R ₂ represents a hydrogen atom or the like, R ₃ to R ₇ may be the same or different, a hydrogen atom, a cyano group, a trifluoromethyl group, a nitro group shows such linear or branched alkyl group optionally having 1 to 8 carbon atoms which may have a substituent. R ₂ to R ₇ may be bonded to each other to form a ring. V, W, X, Y and Z represents a carbon atom or a nitrogen atom, and V, W, X, Y and Z are as 0-3 that one is a nitrogen atom, a nitrogen atom in this case R shall no substituent of ₃ to R _7. However, R ₃ at least one of to R ₇ assumed a cyano group, a linear or branched alkyl group which has 1 to 4 carbon atoms substituted with a nitro group, or more than two fluorine atoms. ]