An apparatus for manufacturing a poly crystalline silicon ingot for a solar cell is provided to uniformly grow silicon crystalline from a lower direction to an upper direction. An apparatus for manufacturing a poly crystalline silicon ingot for a solar cell includes a vacuum chamber(100), a crucible(200), a susceptor(210), a support frame, heaters(310,320), an adiabatic plate, a door, a cooling plate, a cooling plate support shaft, a conveying means, temperature sensors(610,620), and a controller. The crucible is installed in the vacuum chamber. The susceptor wraps to protect the crucible. The support frame supports the susceptor. The heater applies heat to melt a silicon material in the crucible. The adiabatic plate is spaced apart from a lower side of the susceptor. The door opens and closes a hole of the adiabatic plate. The cooling plate is attached to a lower side of the susceptor. A coolant path is formed inside the cooling plate shaft. The cooling plate conveying means conveys the cooling plate and the cooling plate shaft. The temperature sensors sense a temperature in the crucible. The controller controls a temperature in the crucible.
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