There are provided a method of manufacturing a piezoelectric vibrating reed capable of improving the reliability of a product by sorting out a defective product correctly, a piezoelectric vibrating reed, a piezoelectric vibrator having a piezoelectric vibrating reed, an oscillator, an electronic apparatus, and a radio-controlled timepiece. In a resist pattern forming step, a resist pattern is formed by performing contact exposure on a photoresist film in a state where a photomask is in close contact with the photoresist film. Before the resist pattern forming step, a photomask treatment step is included in which when a defect is found in an outer shape equivalent region equivalent to the outer pattern in the photomask, a part of a light shielding film pattern is removed to change the shape of the outer shape equivalent region where damage is present.