Suturing device and suturing method

A suturing device, comprising:

• a plurality of suture needles arranged in a row at certain intervals along a first direction, the plurality of suture needles each having a distal end portion formed with a thread hooking portion configured to allow a first thread to be hooked thereon;
• a first-thread holding mechanism configured to hold the first thread to be engaged with the plurality of suture needles;
• a needle moving mechanism configured to move the plurality of suture needles in a second direction intersecting the first direction, the second direction being a direction in which a distal end of each of the plurality of suture needles is directed;
• and
• a thread turning structure configured to locally turn a portion of the first thread hooked on the distal end portion of each of the plurality of suture needles in the first thread stretched in the first direction around a needle axis thereof such that the portion of the first thread extends in a direction along a third direction intersecting the first direction and the second direction, in a state where the plurality of suture needles have been moved in the second direction,
• wherein each of the plurality of suture needles has a side surface formed with a threading recessed groove extending through the side surface in the first direction in the state where each of the plurality of suture needles has been moved in the second direction.