Liquid discharging head

A liquid discharging head comprising:

• a channel unit having a liquid channel which includes:
• a nozzle arranged at an end part, of the channel unit, on one side in a first direction;
• and
• a pressure chamber arranged at an end part, of the channel unit, on the other side in the first direction and communicating with the nozzle;
• and
• a piezoelectric element including:
• a vibration plate arranged on a surface, of the channel unit, on the other side in the first direction and covering the pressure chamber;
• and
• a piezoelectric layer arranged on a surface, of the vibration plate, on the other side in the first direction,
• wherein an area, of the pressure chamber, which is projected in the first direction is not more than 50000 μm2,
• a diameter of the nozzle is increased from the one side toward the other side in the first direction, and
• a relationship of:
• θ+1.5×10−4×S>11 is satisfied, provided that θ is an inclination angle of an inner wall surface of the nozzle with respect to the first direction, and that the area of the pressure chamber is S μm2.