A level converting apparatus for converting an original voltage level to a wanted voltage level is disclosed. The level converter includes a converting part for outputting a level-converting signal having a different level from that of an input signal in response to an input signal; a delay part for delaying the level-converted signal of the converting part by a predetermined time; and a self-reset part for generating a reset signal in response to the delayed level-converted signal of the delay part to output it to the converting part so that a pulse width of the level-converted signal as output is set as much as the sum of a predetermined delay time and an internal operation delay time.