The present invention relates to a reusable diaper shaped as a pair of pants and designed to house a removable absorbent insect (6). The diaper comprises an elongated central piece (5) impermeable to water and designed to house said insert, and two side pieces (12,13) arranged on opposite sides of the central piece, wherein at least one of the side pieces is made of a material permeable to water and is arranged stretchable to allow stretching of waist and leg openings of the diaper when the diaper is put on and taken off, and the central piece and the side piece are joined together by means of a joint (15,16) forming a liquid barrier.
