A medicament-packing unit, comprising: a sheet feeder for feeding a packing sheet folded into two in a longitudinal direction; a medicament-feeding hopper for providing a medicament on the packing sheet fed by the sheet feeder; and a heat-sealing section for sealing the packing sheet to pack the medicament provided on the packing sheet, the heat-sealing section comprising: a horizontal sealing roller that seals the packing sheet in a horizontal direction; a first drive motor that drives the horizontal sealing roller; a vertical sealing roller that seals the packing sheet in a vertical direction; characterized in that the heat-sealing section comprises a second drive motor which drives the vertical sealing roller; a motor controller which controls the first drive motor and the second drive motor; wherein the first drive motor is maintained ON and the horizontal sealing roller continuously rotates; wherein the vertical sealing roller rotates with the horizontal sealing roller or stops based on an amount of rotation of the horizontal sealing roller; wherein a signal to clear a deviation between the horizontal sealing roller and the vertical sealing roller is transmitted while the second drive motor is OFF; and wherein a number of feedback pulses transmitted from the horizontal sealing roller is counted to monitor the amount of rotations of the horizontal sealing roller. a sheet feeder for feeding a packing sheet folded into two in a longitudinal direction; a medicament-feeding hopper for providing a medicament on the packing sheet fed by the sheet feeder; and a heat-sealing section for sealing the packing sheet to pack the medicament provided on the packing sheet, the heat-sealing section comprising: a horizontal sealing roller that seals the packing sheet in a horizontal direction; a first drive motor that drives the horizontal sealing roller; a vertical sealing roller that seals the packing sheet in a vertical direction; characterized in that the heat-sealing section comprises a second drive motor which drives the vertical sealing roller; a motor controller which controls the first drive motor and the second drive motor; wherein the first drive motor is maintained ON and the horizontal sealing roller continuously rotates; wherein the vertical sealing roller rotates with the horizontal sealing roller or stops based on an amount of rotation of the horizontal sealing roller; wherein a signal to clear a deviation between the horizontal sealing roller and the vertical sealing roller is transmitted while the second drive motor is OFF; and wherein a number of feedback pulses transmitted from the horizontal sealing roller is counted to monitor the amount of rotations of the horizontal sealing roller. a horizontal sealing roller that seals the packing sheet in a horizontal direction; a first drive motor that drives the horizontal sealing roller; a vertical sealing roller that seals the packing sheet in a vertical direction; characterized in that the heat-sealing section comprises a second drive motor which drives the vertical sealing roller; a motor controller which controls the first drive motor and the second drive motor; wherein the first drive motor is maintained ON and the horizontal sealing roller continuously rotates; wherein the vertical sealing roller rotates with the horizontal sealing roller or stops based on an amount of rotation of the horizontal sealing roller; wherein a signal to clear a deviation between the horizontal sealing roller and the vertical sealing roller is transmitted while the second drive motor is OFF; and wherein a number of feedback pulses transmitted from the horizontal sealing roller is counted to monitor the amount of rotations of the horizontal sealing roller.