A device for individually packaging medication, configured so that the difference in temperature between a lateral sealing unit and a longitudinal sealing unit is reduced to reduce the manufacturing cost of a packaging sheet, so that the structure of the sealing units is simple, and so that the size of individual package bags is adjusted according to the amount of supply of the medication. A device for individually packaging medication comprises: a conveyance member (27) for conveying a long packaging sheet (S) with the packaging sheet (S) folded in two along the longitudinal direction thereof and with the fold line disposed on the lower side and a sealing member (36) for sealing the packaging sheet (S). The sealing member (36) is configured by integrating a longitudinal sealing unit (41) and a lateral sealing unit (42), the longitudinal sealing unit (41) being adapted to seal the edge of the packaging sheet (S), the edge being located on the side opposite the fold line, the lateral sealing unit (42) being adapted to seal the packaging sheet (S) at predetermined intervals in the longitudinal direction. The device for individually packaging medication also comprises: a support member (51) for supporting the sealing member (36) so that the sealing member (36) can come into contact with and separate from the packaging sheet (S) and a control unit (83) which, during when the packaging sheet (S) is sealed by the lateral sealing unit (42) and the packaging sheet (S) is sealed by the longitudinal sealing unit (41), causes the sealing member (36) to rotate idle while separating the longitudinal sealing unit (41) from the packaging sheet (S) and then causes the longitudinal sealing unit (41) to again come into contact with the packaging sheet (S).本發明係提供一種藥劑分包裝置,可降低橫密封部與縱密封部的溫度差,削減包裝片的製造成本,並且簡化密封部的構造,且根據藥劑的供給量調整分包袋的大小。該藥劑分包裝置具備有:搬送構件27,係使長尺狀包裝片S沿長度方向形成兩折的狀態下,使折痕位於下方側而搬送;和密封構件36,用以密封包裝片S。密封構件36係包含將與包裝片S的折痕相反側的緣部密封的縱密封部41,和在長度方向以規定間隔密封的橫密封部42一體化的構成,其具備:支持構件51,可接觸分離地支持密封構件36;和控制