A manufacturing apparatus for an absorbent body comprising: a first conveyor (C1) that conveys an air-permeable first sheet (S1) while sucking the first sheet (S1) along a flat first slope surface (F1); a second conveyor (C2) that conveys an air-permeable second sheet (S2) while sucking the second sheet (S2) along a flat second slope surface (F2) having a slope opposite to the first slope surface (F1); a first distribution device that forms a first absorbent layer (L1) in the first sheet (S1) by distributing absorbent powder on an upper surface of the first sheet (S1) being conveyed along the first slope surface (F1); a second distribution device that forms a second absorbent layer (L2) in the second sheet (S2) by distributing absorbent powder on an upper surface of the second sheet (S2) being conveyed along the second slope surface (F2); a stacking part that stacks the first sheet (S1) conveyed by the first conveyor (C1) and the second sheet (S2) conveyed by the second conveyor (C2) in such a manner as to cause the first absorbent layer (L1) of the first sheet (S1) and the second absorbent layer (L2) of the second sheet (S2) to face each other; the stacking part is a stacking roller (R) that rolls in the first sheet (S1) conveyed by the first conveyor (C1) and the second sheet (S2) conveyed by the second conveyor (C2) and also stacks the first sheet (S1) and the second sheet (S2) on each other, and a stacking conveyor (C3) that a thin paper (T) is fed on, the stacking conveyor (C3) conveying the thin paper (T) and the first and second sheets (S1, S2) downstream in a state where the thin paper (T) is provided under a stack (S) of the first and second sheets (S1, S2) stacked together, the stacking conveyor (C3) contacting the stacking roller (R) with the stack (S) and the thin paper (T) therebetween. a first conveyor (C1) that conveys an air-permeable first sheet (S1) while sucking the first sheet (S1) along a flat first slope surface (F1); a second conveyor (C2) that conveys an air-permeable second sheet (S2) while sucking the second sheet (S2) along a flat second slope surface (F2) having a slope opposite to the first slope surface (F1); a first distribution device that forms a first absorbent layer (L1) in the first sheet (S1) by distributing absorbent powder on an upper surface of the first sheet (S1) being conveyed along the first slope surface (F1); a second distribution device that forms a second absorbent layer (L2) in the second sheet (S2) by distributing absorbent powder on an upper surface of the second sheet (S2) being conveyed along the second slope surface (F2); a stacking part that stacks the first sheet (S1) conveyed by the first conveyor (C1) and the second sheet (S2) conveyed by the second conveyor (C2) in such a manner as to cause the first absorbent layer (L1) of the first sheet (S1) and the second absorbent layer (L2) of the second sheet (S2) to face each other; the stacking part is a stacking roller (R) that rolls in the first sheet (S1) conveyed by the first conveyor (C1) and the second sheet (S2) conveyed by the second conveyor (C2) and also stacks the first sheet (S1) and the second sheet (S2) on each other, and a stacking conveyor (C3) that a thin paper (T) is fed on, the stacking conveyor (C3) conveying the thin paper (T) and the first and second sheets (S1, S2) downstream in a state where the thin paper (T) is provided under a stack (S) of the first and second sheets (S1, S2) stacked together, the stacking conveyor (C3) contacting the stacking roller (R) with the stack (S) and the thin paper (T) therebetween. <EOS>