A printer has a paper feed mechanism that can reliably balance the paper feed force of the paper feed roller and paper pressure roller on the left and right sides of the recording paper width. Using the self-centering action of a pressure lever fulcrum and adjustment of the position where an extension spring applies force, the paper feed mechanism of a printer can press the paper pressure roller that is supported by a pressure lever to a paper feed roller so that the paper pressure roller applies equal pressure at all points along the width of the paper feed roller, can balance the paper feed force applied by the paper feed roller and the paper pressure roller to the recording paper left and right widthwise to the paper, and can prevent the recording paper from meandering, skewing, and jamming.