PURPOSE: To provide the beat interference elimination device of a tuner capable of making a program versatile without the need of a change even when a using equipment and a using frequency are different, reducing the burden of the memory capacity of a microcomputer, facilitating the design of the program and realizing ideal beat elimination.

CONSTITUTION: In a storage means inside the microcomputer for controlling the oscillation frequency of an internal oscillation circuit and eliminating beat interference given to the tuner by the higher harmonic of the oscillation frequency, the control data of a repetitive pattern provided with periodicity to be the oscillation frequency optimum for beat elimination obtained by performing simulation beforehand corresponding to a reception frequency are made into a matrix by the pattern repetitive variable I of the same pattern and a frequency step repetitive variable J and stored. By a control program, the pattern repetitive variable I of the same pattern and the frequency step repetitive variable J corresponding to the reception frequency F are obtained based on the stored data and the control data BIAS(I,J) corresponding to the variables are obtained.