Medical observation apparatus and medical observation system

A medical observation apparatus comprising:

• a microscope unit that captures a magnified image of a microscopic part of an observation target and outputs an imaging signal thereof;
• a support unit that movably supports the microscope unit, and includes a plurality of arm portions and a plurality of joint portions each of which connects two of the arm portions and rotatably holds one of the two arm portions around a predetermined shaft portion with respect to the other one of the two arm portions;
• and
• one or a plurality of cables connected to the microscope unit and inserted into an interior of the support unit, wherein
• the shaft portion has a cylindrical shape into which the one or the plurality of cables can be inserted, and
• the joint portion, of the plurality of joint portions, that connects two arm portions in which an extending direction of one of the arm portions and an extending direction of the other one of the arm portions are orthogonal to each other, includes:
• a rotating portion that is rotatable according to rotational power of the shaft portion, and
• a restraining portion that is provided at a position where a central axis thereof is offset from a central axis of the shaft portion and that can restrain the rotation of the rotating portion.