PURPOSE: To provide a rotary variable resistor having a size smaller than that of arrayal of fixed resistors by providing plural through-holes in an insulating substrate, then inserting fixed resistors into the through-holes, and providing conductive patterns connected to the fixed resistors on the front side of the insulating substrate.

CONSTITUTION: A circular first conductive pattern 30, and a group of second conductive patterns 31, 31... at regular intervals are formed on one side of an insulating substrate 5. A group of third conductive patterns are formed on the other side of the insulating substrate 5 at the same angles as those of the group of second conductive patterns 31, 31.... A group of first through- holes 33, 33... for interconnecting the first conductive pattern 30 and the third conductive patterns are provided in the insulating substrate 5. In this group of through-holes, fixed resistors 35, 35... having electrode sections 35a on both ends are inserted so as to face the front and back sides of the insulating substrate 5.