The present invention relates to a medical system wherein an insertion slave apparatus and a treatment slave apparatus are used together with each other, and the insertion slave apparatus is operated by an insertion master portion and the treatment slave apparatus is operated by a treatment master portion. An object of the present invention is providing a medical system whose operability is improved. A medical system characterized by including an insertion slave apparatus (36 117) configured to be inserted into a body, a treatment slave apparatus (63g 63h) configured to be inserted into the body together with the insertion slave apparatus (36 117) and configured to be used together with the insertion slave apparatus (36 117) to treat an object of treatment, an insertion master portion (95e 95o) having a similar figure to the insertion slave apparatus (36 117), wherein the insertion slave apparatus (36 117) is configured to perform following actuation according to operation input to the insertion master portion (95e 95o), a treatment master portion (95g 95h) configured to be operated by an operator, wherein the treatment slave apparatus (63g 63h) is configured to perform following actuation according to operation input to the treatment master portion (95g 95h), and a connecting portion (1031 103r) coupling the insertion master portion (95e 95o) and the treatment master portion (95g 95h) to each other, wherein the insertion master portion (95e 95o) is configured to be operated through the connecting portion (1031 103r) by holding and operating the treatment master portion (95g 95h).
