A device for manufacturing an elastic laminate in which an elastic member is sandwiched between a pair of sheets (S1, S2), comprising: a pair of nip rolls configured to sandwich the pair of sheets (S1, S2) with the elastic member interposed between the both sheets (S1, S2) conveyed in longitudinal directions of the sheets (S1, S2) and arranged such that axes of the pair of nip rolls are parallel; a guide member provided upstream of the both nip rolls in the conveying directions of the both sheets (S1, S2) and configured to guide the elastic member to between the both sheets (S1, S2) while feeding the elastic member in a longitudinal direction of the elastic member; and a drive mechanism configured to drive the guide member such that the guide member reciprocates along a travel path along a direction of the axes of the both nip rolls, the drive mechanism including a belt having the guide member fixed thereto, a plurality of pulleys configured such that the belt is provided thereon along an annular path including the travel path, a motor configured to drive the pulleys to be successively rotated in forward and reverse directions to reciprocate the guide member along the travel path and a regulating mechanism configured to permit a movement of the guide member relative to the both nip rolls along the travel path and regulate a movement of the guide member relative to the both nip rolls in a direction orthogonal to the travel path, characterized by comprising a guide plate as the guide member, wherein the drive mechanism is provided on the side of one of the both nip rolls with respect to a plane including a tangent to the outer circumferential surfaces of the both nip rolls at a sandwiching position of the both sheets (S1, S2) between the outer circumferential surfaces of the both nip rolls; the guide plate includes a holding portion arranged in a direction orthogonal to the tangent and a main body portion extending from an end part of the holding portion closer to the one nip roll in a direction to avoid the one nip roll and attached to the drive mechanism; the holding portion is formed with an insertion hole penetrating through the holding portion in a thickness direction of the holding portion for the passage of the elastic member; and a hold-side bent portion between the holding portion and the main body portion in the guide plate is formed with a hold-side hollow portion penetrating through the guide plate in the thickness direction of the guide plate such that a cross-sectional area of the hold-side bent portion is smaller than those of parts of the holding portion and the main body portion adjacent to the hold-side bent portion. a pair of nip rolls configured to sandwich the pair of sheets (S1, S2) with the elastic member interposed between the both sheets (S1, S2) conveyed in longitudinal directions of the sheets (S1, S2) and arranged such that axes of the pair of nip rolls are parallel; a guide member provided upstream of the both nip rolls in the conveying directions of the both sheets (S1, S2) and configured to guide the elastic member to between the both sheets (S1, S2) while feeding the elastic member in a longitudinal direction of the elastic member; and a drive mechanism configured to drive the guide member such that the guide member reciprocates along a travel path along a direction of the axes of the both nip rolls, the drive mechanism including a belt having the guide member fixed thereto, a plurality of pulleys configured such that the belt is provided thereon along an annular path including the travel path, a motor configured to drive the pulleys to be successively rotated in forward and reverse directions to reciprocate the guide member along the travel path and a regulating mechanism configured to permit a movement of the guide member relative to the both nip rolls along the travel path and regulate a movement of the guide member relative to the both nip rolls in a direction orthogonal to the travel path,