A trigger dispensing head for dispensing a liquid product, which can be applied to a bottle of a dispensing device , comprising: - a frame for supporting components of the dispensing head , comprising a connecting portion for application to the bottle , comprising an annular skirt having a skirt axis (J); - a piston chamber supported by the frame , having extension along a piston axis (X), and a piston sealingly sliding in the piston chamber , between a resting position and a dispensing position in which the product is dispensed outside; - a dispensing pipe supported by the frame , fluidly in communication with the piston chamber , for dispensing, at the front, the product, having extension along a dispensing axis (Y), wherein the piston axis (X) and the dispensing axis (Y) lie on an imaginary sagittal plane (S); wherein the sagittal plane (S) subdivides the head into a right half-part and a left half-part; - a trigger supported by the frame , which can be actuated to bias the piston from the resting position to the dispensing position; - an at least partially elastic return element , supported by the frame and adapted to bias the piston , permanently and either directly or indirectly, from the dispensing position to the resting position, wherein the return element comprises two arms , wherein each arm has extension between a lower end and an upper end and is arranged in a respective half-part of the head with respect to the sagittal plane (S); - a lower backing part supported by the frame , having a main surface ; wherein the trigger dispensing head is characterized in that said lower ends of the return element are in contact with the main surface and freely movable thereon in receding and approaching relative to the upper ends between a plurality of zones of said main surface distanced along the skirt axis (J). - a frame for supporting components of the dispensing head , comprising a connecting portion for application to the bottle , comprising an annular skirt having a skirt axis (J); - a piston chamber supported by the frame , having extension along a piston axis (X), and a piston sealingly sliding in the piston chamber , between a resting position and a dispensing position in which the product is dispensed outside; - a dispensing pipe supported by the frame , fluidly in communication with the piston chamber , for dispensing, at the front, the product, having extension along a dispensing axis (Y), wherein the piston axis (X) and the dispensing axis (Y) lie on an imaginary sagittal plane (S); wherein the sagittal plane (S) subdivides the head into a right half-part and a left half-part; - a trigger supported by the frame , which can be actuated to bias the piston from the resting position to the dispensing position; - an at least partially elastic return element , supported by the frame and adapted to bias the piston , permanently and either directly or indirectly, from the dispensing position to the resting position, wherein the return element comprises two arms , wherein each arm has extension between a lower end and an upper end and is arranged in a respective half-part of the head with respect to the sagittal plane (S); - a lower backing part supported by the frame , having a main surface ; <EOS>