A method for transmitting and receiving scheduling information in a communication system is disclosed. A method for operating a UE comprises the steps of: receiving, from a base station, a control channel including scheduling information of first data in slot #n; receiving, from the base station, a data channel including the first data and second data in the slot #n; receiving, from the base station, a control channel in slot #n+k, the control channel including PI indicating a transmission position of the second data in the slot #n; and demodulating the data channel on the basis of the scheduling information and the PI. Therefore, the performance of a communication system can be improved.