A prepreg sheet automatic lamination device (10;70;80) for laminating a plurality of semi-cured prepreg sheets, the prepreg sheet automatic lamination device (10;70;80) comprising: a compactor group (28;28-1;28-2;65;71;81) including a plurality of compactors (40;73;83) that are arranged so as to each press a laminated sheet including a release sheet and a semi-cured prepreg sheet attached to a first surface of the release sheet onto a top surface of a laminate base formed of at least one semi-cured prepreg sheet, from a second surface side of the release sheet of the laminated sheet; a stage on which the laminate base is to be placed; a laminated sheet supply portion configured to supply the laminated sheet onto the top surface of the laminate base; and a release sheet recovery portion configured to recover the release sheet peeled off from the semi-cured prepreg sheet pressed, by the compactor group (28;28-1;28-2;65;71;81), onto the top surface of the laminate base, the compactor (40;73;83) comprising: a pair of first rollers (46-1,46-2) disposed separated from each other, each of the first rollers (46-1,46-2) having a first roller surface (46-1a,46-2a) that is configured to press the laminated sheet from the second surface side of the release sheet; a second roller having a second roller surface that is configured to press the laminated sheet from the second surface side of the release sheet, the second roller being disposed such that the second roller surface faces a gap provided between the pair of first rollers (46-1,46-2), a first rotating shaft configured to rotatably support the pair of first rollers (46-1,46-2); a second rotating shaft configured to rotatably support the second roller; and a roller retaining portion configured to retain the pair of first rollers (46-1,46-2) and the second roller, via the first and second rotating shafts (43,51). a compactor group (28;28-1;28-2;65;71;81) including a plurality of compactors (40;73;83) that are arranged so as to each press a laminated sheet including a release sheet and a semi-cured prepreg sheet attached to a first surface of the release sheet onto a top surface of a laminate base formed of at least one semi-cured prepreg sheet, from a second surface side of the release sheet of the laminated sheet; a stage on which the laminate base is to be placed; a laminated sheet supply portion configured to supply the laminated sheet onto the top surface of the laminate base; and a release sheet recovery portion configured to recover the release sheet peeled off from the semi-cured prepreg sheet pressed, by the compactor group (28;28-1;28-2;65;71;81), onto the top surface of the laminate base, the compactor (40;73;83) comprising: a pair of first rollers (46-1,46-2) disposed separated from each other, each of the first rollers (46-1,46-2) having a first roller surface (46-1a,46-2a) that is configured to press the laminated sheet from the second surface side of the release sheet; a second roller having a second roller surface that is configured to press the laminated sheet from the second surface side of the release sheet, the second roller being disposed such that the second roller surface faces a gap provided between the pair of first rollers (46-1,46-2), a first rotating shaft configured to rotatably support the pair of first rollers (46-1,46-2); a second rotating shaft configured to rotatably support the second roller; and a roller retaining portion configured to retain the pair of first rollers (46-1,46-2) and the second roller, via the first and second rotating shafts (43,51). a pair of first rollers (46-1,46-2) disposed separated from each other, each of the first rollers (46-1,46-2) having a first roller surface (46-1a,46-2a) that is configured to press the laminated sheet from the second surface side of the release sheet; a second roller having a second roller surface that is configured to press the laminated sheet from the second surface side of the release sheet, the second roller being disposed such that the second roller surface faces a gap provided between the pair of first rollers (46-1,46-2), a first rotating shaft configured to rotatably support the pair of first rollers (46-1,46-2); a second rotating shaft configured to rotatably support the second roller; and a roller retaining portion configured to retain the pair of first rollers (46-1,46-2) and the second roller, via the first and second rotating shafts (43,51).