To provide an antistatic agent which shows high solubility in an aqueous composition or a non-aqueous composition such as an organic solvent solution, shows no chemical interference such as salt exchange with an additive such as an ionic surfactant such as a carboxylic acid metal salt and exerts a high antistatic performance in a low amount of use.

The antistatic agent essentially comprises a perfluoroalkyl group-containing amine N-oxide compound represented by formula (1) (wherein Rf is a perfluoroalkyl group having a 2-20C etheric oxygen atom; A is an oxygen atom, a 1-10C bivalent linking group having an etheric oxygen atom or a group of the formula: -SO2NR3(CH2)mO- [wherein R3 is a hydrogen atom or a 1-4C alkyl group; and m is an integer of 1-4]; and R1 and R2 are each independently a 1-6C alkyl group, a 1-6C hydroalkyl group or the like). A resin composition comprises 0.01-5 wt.% antistatic agent per resin solid content.