A data transfer apparatus capable of effectively performing image transfer in a simple manner is provided.The data transfer apparatus that transfers image data in an image buffer memory to a display includes: a packet generation section that generates a transfer packet included of valid data and dummy data, the valid data being the image data, and transfers the transfer packet to the display; and a packet generation section that adjusts a ratio between the valid data and the dummy data in the transfer packet based on a data storage amount in the image buffer memory.