PURPOSE:To improve sticking effect of chemical such as agricultural chemical by forming a core rod having a step to the center of an atomizing device of an atomizing nozzle thus causing wavy motion of ejected mist. CONSTITUTION:A core 5 provided with a threaded part 6 is screwed into a main body 4 of a spray device. A core rod 1 having a step 2 is formed at the top of the core. A liquid is rotated by an obliquely guiding channel 7 and introduced into a chamber 9. The liquid rotates quickly around the core rod 1 colliding thereby violently with the step 2 of the core rod 1 to cause repeating movement, then ejected from the nozzle 3. Accordingly, the ejected mist exhibits wavy motion. Therefore, the mist of the chemical such as agricultural chemical can stick to the rear side of leaves penetrating also to the inside of a fruit tree, etc. Thus, the insecticidal effect of the atomizing nozzle is improved.
