Quick-release nebulizer

A nebulizer comprising:

• a main body (1), comprising a body (11), and the body (11) defining an axial direction (d1) and a radial direction (d2);
• a spraying head (2), comprising a spraying seat (21) assembled to or disassembled from the body (11) along the radial direction (d2);
• and
• an engagement structure (4), comprising a notch (41) disposed on one of the body (11) and the spraying seat (21), a T-shaped trench (42) disposed on an inner wall of the notch (41) along the axial direction (d1), an engaging trench (43) disposed on another one of the body (11) and the spraying seat (21) and arranged corresponding to the notch (41), and a movable member (44) received in the notch (41), wherein a side of the movable member (44) is extended with a handle (441) exposed from the notch (41), another side of the movable member (44) is extended with a T-shaped block (442) slidably received in the T-shaped trench (42), and still another side of the movable member (44) is protruded with an engaging block (443) embedded in or separated from the engaging trench (43) along the axial direction.