A refrigerator comprising: a storage chamber configured to store food; a cooler configured to supply cold into the storage chamber; a first temperature sensor configured to sense a temperature within the storage chamber; a first tray assembly configured to define one portion of an ice making cell that is a space in which water is phase-changed into ice by the cold; a second tray assembly configured to define the other portion of the ice making cell, the second tray assembly being connected to a driver to contact the first tray assembly in an ice making process and to be spaced apart from at least a portion of the first tray assembly in an ice separation process; a water supply part configured to supply the water into the ice making cell; a second temperature sensor configured to sense a temperature of the water or the ice within the ice making cell; a heater disposed adjacent to at least one of the first tray assembly or the second tray assembly; and a controller configured to control the heater and the driver, wherein the controller controls the cooler so that the cold is supplied to the ice making cell after the second tray assembly moves to an ice making position when the water is completely supplied to the ice making cell, the controller controls the second tray assembly so that the second tray assembly moves in a reverse direction after moving to an ice separation position in a forward direction so as to take out the ice in the ice making cell when the ice is completely made in the ice making cell, the controller controls the second tray assembly so that a supply of the water starts after the second tray assembly moves to a water supply position in the reverse direction when the ice is completely transferred, the refrigerator further comprises a pusher provided with a first edge on which a surface configured to press one or more of the first and second tray assemblies (201, 211) is disposed to easily separate the ice from the one or more of the first and second tray assemblies (201, 211), a bar extending from the first edge, and a second edge disposed at an end of the bar, the controller controls at least one of the pusher or the second tray assembly to move so as to change a relative position between the pusher and the second tray assembly; characterized in that: the controller controls a position of the first edge to be disposed at different positions at the water supply position and the ice making position. a storage chamber configured to store food; a cooler configured to supply cold into the storage chamber; a first temperature sensor configured to sense a temperature within the storage chamber; a first tray assembly configured to define one portion of an ice making cell that is a space in which water is phase-changed into ice by the cold; a second tray assembly configured to define the other portion of the ice making cell, the second tray assembly being connected to a driver to contact the first tray assembly in an ice making process and to be spaced apart from at least a portion of the first tray assembly in an ice separation process; a water supply part configured to supply the water into the ice making cell; a second temperature sensor configured to sense a temperature of the water or the ice within the ice making cell; a heater disposed adjacent to at least one of the first tray assembly or the second tray assembly; and a controller configured to control the heater and the driver, wherein the controller controls the cooler so that the cold is supplied to the ice making cell after the second tray assembly moves to an ice making position when the water is completely supplied to the ice making cell, the controller controls the second tray assembly so that the second tray assembly moves in a reverse direction after moving to an ice separation position in a forward direction so as to take out the ice in the ice making cell when the ice is completely made in the ice making cell, the controller controls the second tray assembly so that a supply of the water starts after the second tray assembly moves to a water supply position in the reverse direction when the ice is completely transferred, the refrigerator further comprises a pusher provided with a first edge on which a surface configured to press one or more of the first and second tray assemblies (201, 211) is disposed to easily separate the ice from the one or more of the first and second tray assemblies (201, 211), a bar extending from the first edge, and a second edge disposed at an end of the bar, the controller controls at least one of the pusher or the second tray assembly to move so as to change a relative position between the pusher and the second tray assembly;