An inkjet recording medium having a recording layer including a pigment and a polyvinyl alcohol on an air-permeable support, wherein inkjet recording medium is made by coating a treatment solution on the recording layer, wherein the treatment solution has the action of solidifying the polyvinyl alcohol in the recording layer when it is in the wet state, and then bringing the recording layer into pressure contact with a heated mirror surface while it is still wet. This treatment solution is a mixed solution of borate/boric acid, wherein the blending ratio of the borate and boric acid in the treatment solution is 0.25/1 to 2/1 by weight ratio.