A base station antenna with a slot is provided. I started anten, the first reflector; And comprising: a power supply PCB is coupled to a lower portion of the first reflector, the top surface of the power supply PCB conductor layer and the portion is formed part is removed the slots of the conductive layer, it is formed with feed line the lower surface of the power supply PCB It said first reflector has an opening is formed on the basis of the position of the power supply PCB. The disclosed antenna has stable electrical properties, there is an advantage that can stabilize the sensitivity by improving the isolation characteristic between the slot and the power supply PCB.