An electrolytic cell (10, 50), comprising: a housing configured to hold an electrolyte solution; a first diaphragm (11, 55) partitioning an interior of the housing into a first cell (12, 12+56) and a second cell, the first diaphragm (11,55) being a porous membrane made of a resin or an insulative porous material; a first electrode provided inside the first cell, the first electrode comprising a first surface facing the first diaphragm, a second surface different from the first surface, and a first hole configured to distribute the electrolyte solution between the first surface side and the second surface side; a second electrode provided inside the second cell adjacent to the first diaphragm, the second electrode comprising a third surface adjacent to the first diaphragm, a fourth surface different from the third surface, and a second hole configured to distribute the electrolyte solution between the third surface side and the fourth surface side; and a first discharge port configured to discharge the electrolyte solution from the second cell, wherein the first cell (12, 12+56) is configured to supply the electrolyte solution supplied therein to the third surface side of the second cell, the second cell is configured to be supplied with the electrolyte solution distributed only through the second hole of the second electrode and to be remained as a vapor phase, and the first discharge port is configured to discharge the electrolyte solution that is collected at a bottom part of the second cell beneath the vapor phase; wherein the first electrode is a positive electrode, and the second electrode is a negative electrode; further comprising a second diaphragm partitioning an interior of the first cell (12+56) into a third cell and a fourth cell, wherein the first electrode is provided inside the third cell, the first surface of the first electrode being provided adjacent to the second diaphragm, the fourth cell is provided between the first diaphragm and the second diaphragm, and the fourth cell is configured to be supplied with the electrolyte solution. a housing configured to hold an electrolyte solution; a first diaphragm (11, 55) partitioning an interior of the housing into a first cell (12, 12+56) and a second cell, the first diaphragm (11,55) being a porous membrane made of a resin or an insulative porous material; a first electrode provided inside the first cell, the first electrode comprising a first surface facing the first diaphragm, a second surface different from the first surface, and a first hole configured to distribute the electrolyte solution between the first surface side and the second surface side; a second electrode provided inside the second cell adjacent to the first diaphragm, the second electrode comprising a third surface adjacent to the first diaphragm, a fourth surface different from the third surface, and a second hole configured to distribute the electrolyte solution between the third surface side and the fourth surface side; and a first discharge port configured to discharge the electrolyte solution from the second cell, wherein the first cell (12, 12+56) is configured to supply the electrolyte solution supplied therein to the third surface side of the second cell, the second cell is configured to be supplied with the electrolyte solution distributed only through the second hole of the second electrode and to be remained as a vapor phase, and the first discharge port is configured to discharge the electrolyte solution that is collected at a bottom part of the second cell beneath the vapor phase; wherein the first electrode is a positive electrode, the first cell (12, 12+56) is configured to supply the electrolyte solution supplied therein to the third surface side of the second cell, the second cell is configured to be supplied with the electrolyte solution distributed only through the second hole of the second electrode and to be remained as a vapor phase, and the first discharge port is configured to discharge the electrolyte solution that is collected at a bottom part of the second cell beneath the vapor phase; wherein the first electrode is a positive electrode, and the second electrode is a negative electrode; further comprising a second diaphragm partitioning an interior of the first cell (12+56) into a third cell and a fourth cell, wherein the first electrode is provided inside the third cell, the first surface of the first electrode being provided adjacent to the second diaphragm, the fourth cell is provided between the first diaphragm and the second diaphragm, and the fourth cell is configured to be supplied with the electrolyte solution.