To provide inkjet recording paper which has excellent gas fading resistance, good drying characteristics and excellent ink absorption.

In this inkjet recording paper sheet where a cavity layer and an organic polymer layer are provided on a substrate in this order, the organic polymer layer comprises at least one layer which is mainly composed of an organic polymer; the total dried coating thickness of the organic polymer layer is in a range of ≥0.1 μm and ≤3.0 μm; and a dried coating thickness of an interface mixing layer between the cavity layer and the organic polymer layer brought into contact with the cavity layer is less than 0.2 μm.