Trigger sprayer

A trigger sprayer for attaching to a container and spraying liquid in the container through a nozzle opening portion, comprising:

• a main body portion having a flow path for passing the liquid, a cylinder portion formed in the flow path, and the nozzle opening portion located at a tip of the flow path;
• a trigger portion supported by support shaft portions provided on both sides of the main body portion;
• a piston portion connected to the trigger portion;
• and
• a spring portion forcing the trigger portion forward to return the trigger portion to an original position, wherein the piston portion slides along an inner wall of the cylinder portion based on the forward and rearward rotation of the trigger portion around the support shaft portion,
• a support hole portion formed in the trigger portion to be attached to the support shaft portion has circular shape in side view,
• a cross section of the support shaft portion perpendicular to the axial direction is defected-circular shape, which is a shape in which an arch-shaped portion of at least a part of a circle is cut out, and
• a space is formed between a peripheral edge of the support hole portion and the support shaft portion.