LIQUID SUPPLY DEVICE, LIQUID DISCHARGE UNIT, AND LIQUID DISCHARGE DEVICE

To provide a liquid supply device which can achieve downsizing of the device in a structure including a circulation mechanism.SOLUTION: A liquid supply device includes: a recovery sub tank 2 which is connected to a liquid discharge head 100 and recovers a liquid from the liquid discharge head 100; and a recovery passage 12 which connects the liquid discharge head 100 with the recovery sub tank 2. The recovery sub tank 2 has: a first inflow port 12a serving as a connection part with the recovery passage 12; and a first inner wall part 21 located on an extension line 12b in an inflow direction of the liquid from the recovery passage 12 and facing the first inflow port 12a. The first inner wall part 21 is formed by one of an inclined surface inclining relative to the extension line 12b, an arc, and a curved surface.SELECTED DRAWING: Figure 3 【課題】循環機構を備える構成において装置の小型化を実現可能な液体供給装置を提供する。【解決手段】液体吐出ヘッド１００に接続され、液体吐出ヘッド１００から液体を回収する回収サブタンク２と、液体吐出ヘッド１００と回収サブタンク２とを接続する回収流路１２と、を備え、回収サブタンク２は、回収流路１２との接続部となる第１流入口１２ａと、回収流路１２からの液体流入方向の延長線１２ｂ上にあり、第１流入口１２ａと対向する第１内壁部２１と、を有し、第１内壁部２１は、延長線１２ｂに対して傾斜した傾斜面、円弧及び曲面のいずれかで構成される液体供給装置。【選択図】図３