Quartz crystal resonator and quartz crystal resonator unit

A quartz crystal resonator comprising:

• a body having first and second main surfaces that oppose each other and that includes, in a plan view of one of the first and second main surfaces, a pair of long sides that extend in a first direction and a pair of short sides that extend in a second direction that intersects the first direction;
• a first excitation electrode disposed on the first main surface;
• a second excitation electrode disposed on the second main surface;
• a frame having an inner side surface that surrounds the body and upper and lower surfaces that are respectively located on an upper side and a lower side in a third direction that intersects the first direction and the second direction;
• a first coupling portion that extends in the first direction so as to couple one of the pair of short sides of the body to the inner side surface of the frame and that has an upper surface and a lower surface that are respectively located relative to the upper and lower sides of the frame, respectively;
• and
• a second coupling portion that extends in the first direction so as to couple the other of the pair of short sides of the body to the inner side surface of the frame and that has an upper surface and a lower surface that are respectively located relative to the upper and lower sides of the frame, respectively,
• wherein, first and second through portions are formed between both ends of the body in the second direction and the frame, with the first and second through portions each extending over a length of the body and the first and second coupling portions in the first direction,
• wherein the first main surface and the second main surface are located between the upper surface and the lower surface of the frame in the third direction,
• wherein the upper surface and the lower surface of the first coupling portion each have an inclined portion that is inclined upward in the third direction from the body towards the frame, and
• wherein the upper surface and the lower surface of the second coupling portion each have an inclined portion that is inclined downward in the third direction from the body towards the frame.