Medical observation device and medical observation system

A medical observation system comprising:

• a medical observation device that includes
• a microscope configured to image a surgical site,
• a holding section that holds the microscope on a tip end side,
• a base section to which a base end of the holding section is connected, and
• an operation section configured to perform operating input, the operation section being provided at the base section;
• and
• a display device that displays an image captured by the medical observation device, wherein
• the holding section is configured as a balance arm provided with a counterweight,
• when the base section is viewed from an upper side of the medical observation device, the base section has a first area inside a movable range of the counterweight and a second area outside the movable range of the counterweight on an upper surface of the base section,
• the base end of the holding section is connected to the base section at a location in the first area on the upper surface of the base section, and
• the operation section is arranged at another location in the second area on the upper surface of the base section.