An endless print belt for rotary stamp in which a plurality of print sections are disposed and spaced-out between each other on a surface of a print belt main body, with at least the print surface of the print section being formed of porous material, wherein a groove in the width direction is formed at an intermediate position of each spaced-out part. Preferably, the spaced-out part is formed such that the surface thereof is in a non-porous state and both ends of the groove are formed into a bund part, for preventing ink from running out.