A crystal vibrator that includes a crystal vibration element having a crystal piece and a pair of electrodes that face each other with the crystal piece interposed therebetween; and a holder that accommodates the crystal vibration element. At least one electrode of the pair of electrodes includes an upper layer containing gold and a lower layer between the crystal piece and the upper layer and containing chromium. A surface of the at least one electrode contains a plurality of crystal grains composed of gold and a chromium compound along grain boundaries between the plurality of crystal grains. An area percentage of the plurality of crystal grains is equal to or more than 35% and equal to or less than 60% when the surface of the at least one electrode is viewed in a plan view thereof.