An apparatus for parallel processing according to an example may include a queue memory configured to store one or more queues, a data memory configured to store data, a mapper configured to classify the data into flows and store a pointer of the data in a queue mapped with the flow; a plurality of processors configured to perform a process based on the data; and a distributor configured to extract the data from the data memory by referring to the pointer stored in the queue and transmit the data to the processor, wherein the distributor transmits data corresponding to a single queue to a single processor.