Ice maker and refrigerator

An icemaker, comprising:

• a tray rotatably installed on a door, the tray having an open top;
• a driver that rotates the tray;
• a frame to which the tray is rotatably coupled;
• and
• a water overflowing preventing member provided at one side of the tray to prevent water in the tray from overflowing, wherein the water overflowing preventing member extends in a longitudinal direction at the open top of the tray such that the water overflowing preventing member does not block the open top of the tray, wherein the water overflowing preventing member comprises:
• a first upper portion that includes a hinge portion coupled to the frame;
• a first lower portion that extends from the first upper portion downward to rotate on the hinge portion such that when the tray rotates, the first lower portion rotates with the tray, wherein the first lower portion includes a distal end that is detachably contactable with a surface of a first side of the open top of the tray, the distal end of the first lower portion being pushed up by the surface of the first side of the open top of the tray when the tray rotates;
• and
• a panel that extends in a longitudinal direction at the open top so as not to block the open top, the panel comprising:
• a second lower portion including a distal end that is laid on a surface of a second side of the open top, the second side of the open top being opposite to the first side thereof;
• and
• a second upper portion that extends from the second lower portion upward, wherein the second lower portion and the second upper portion are fixed to the frame so as not to rotate, and wherein the distal end of the second lower portion is spaced apart from the surface of the second side of the open top when the tray rotates.