Disclosed herein is preferably a multi dose type non aqueous oily injectable formulation including an active ingredient (drug) expressing therapeutic effects which is dissolved dispersed or suspended in a therapeutically effective amount in oil. The disclosed non aqueous oily injectable formulation may include an oil affinitive preservative and a hydrophilic excipient non phase separable from the oil affinitive preservative when the excipient is mixed with the oil affinitive preservative.