The present invention improves the operability of an endoscope and increases the degrees of freedom in endoscopic surgery. An endoscopic device (1) is equipped with: an endoscope (1)； a cylindrical retractor (20)； and a connection support member (50) that connects the retractor (20) to a support means (5). The retractor (20) includes: a tube portion (22) into which the endoscope (10) and forceps (2) are inserted； and a spherical supported portion (25) that is provided to the tube portion (22). The outer peripheral surface of the supported portion (25) is shaped as a sphere. The connection support member (50) has a recessed spherical support seat surface (55) that receives the supported portion (25).本發明之目的係提高內視鏡之操作性，提高內視鏡下手術之自由度。內視鏡裝置1具備：內視鏡10；筒狀之牽開器20；及連結支持構件50，其將上述牽開器20連結於支持機構5。牽開器20包含：筒部22，其供內視鏡10及鉗子2插通；及球狀之被支持部25，其設置於筒部22。被支持部25之外周面成球面狀。連結支持構件50具有受承被支持部25之凹球面狀之支持座面55。
