A medical treatment apparatus includes: a pair of holding members, each including a grasping surface configured to grasp a joining target site in living tissue； an energy application mechanism that is provided in at least one of the pair of holding members, the energy application mechanism being configured to apply joining energy and vibration energy to the joining target site through the grasping surface； and a control device configured to sense whether joining at the joining target site is completed by application of the joining energy to the joining target site, and control the energy application mechanism after the joining at the joining target site is completed to apply the vibration energy to the joining target site.
