An apparatus (1) for manufacturing an absorbent body (A) of an absorbent article comprises a feeder (11) for feeding an absorbent material forming an absorbent body, a feeder A mold member (21) having a concave portion (23) which is provided with a concave portion (23) for depositing absorbent material supplied from a feeder, and a mold member (21) attached to the outer peripheral surface (31S) And a suction drum (31) rotatable about an axis (31A) which sucks the absorbent material through the suction hole and deposits the absorbent material in the recess. The die member is composed of a plurality of plate members (25) arranged in series in the rotation direction of the suction drum and provided so as to be divisible from each other, and each plate member forms a recess (27) having the maximum depth different from each other.吸収性物品の吸収体(A)を製造する装置(1)は、吸収体を形成する吸収性材料を供給する供給装置(11)と、製造すべき吸収体の単体の形状に適合した形状を有し且つ供給装置から供給された吸収性材料を堆積させる凹部(23)を備えた型部材(21)と、型部材が外周面(31S)に取付けられて、型部材の凹部に形成された吸引孔を通して吸収性材料を吸引し、その吸収性材料を凹部内に堆積させる、軸線(31A)まわりに回転自在のサクションドラム(31)とを有しする。型部材が、サクションドラムの回転方向に直列的に並設され、且つ相互に分割自在に設けられた複数のプレート部材(25)で構成されていて、各プレート部材が、凹部を形成する、相互に最大深さが異なる窪み部(27)を有している。