A positioning apparatus has an oscillator that generates a reproduced carrier wave which keeps track of a carrier wave of a satellite signal; a pseudo noise generator that generates a pseudo noise code unique to a satellite; a control section that controls a phase of the pseudo noise code in accordance with a change in the phase of the reproduced carrier wave, to thus control the pseudo noise generator so as to keep constant a difference between the phase of the pseudo noise code included in a satellite signal and the phase of the pseudo noise code; a timing generation section that generates a timing associated with a rise or fall of the pseudo noise code; a frequency generation section that generates at least one frequency signal; a sampling section that samples an amplitude of the satellite signal by means of a frequency signal; a cumulative addition section that cumulatively adds a signal sampled by the sampling section; and a phase difference computing section that computes a phase difference between the pseudo noise code included in the satellite signal and the pseudo noise code by use of a result of cumulative addition. The frequency generation section selects a frequency signal in synchronism with a timing generated by the timing generation section.