A medical robot of the present disclosure includes: a surgical tool including a treatment portion, and a body including a driven portion configured to transmit a driving force to the treatment portion; and an attachment portion including a transmitting portion configured to transmit the driving force by being engaged with the driven portion, and an attachment surface configured to face the body. The surgical tool includes a surgical-instrument-engagement-part and the attachment portion includes an attachment-portion-engagement-part. The surgical-instrument-engagement-part and the attachment-portion-engagement-part are configured to allow the surgical tool to be attached to the attachment portion by a relative movement of the surgical tool and the attachment portion in a direction along the attachment surface, and also configured to allow the surgical tool to be removed from the attachment portion by a relative movement of the surgical tool and the attachment portion in a direction intersecting with the attachment surface.