A support for an image recording material comprises base paper having a formation index at a restriction diameter of 1.0 mm equal to or greater than 80 and density equal to or greater than 0.95 g/m.sup.3, changes of said formation index and density of said base paper before and after contact of a front surface of said base paper at a side on which an image recording layer of said imager recording material is formed with water at 20.degree. C. for 30 seconds being equal to or less than 10 and 0.05 g/m.sup.3, respectively.