A suturing device includes first and second holding members, a plurality of needles, a needle moving mechanism, and a suture hook. The first and second holding members are configured to move toward and away from each other to sandwich therebetween edges of a cut. The needles are disposed at the first holding member and aligned in a needle arrangement direction with their points pointing to the second holding member. The needles are configured to hold a suture at tips thereof. The needle moving mechanism is configured to move the plurality of needles toward the second holding member. The suture hook is disposed at the second holding member and configured to move along the needle arrangement direction to catch the suture that has reached the second holding member via the edges of the cut by movement of the needles toward the second holding member by the needle moving mechanism.