Fluoride is recognized as an important trace element playing a vital role in the dental and skeletal formation in human being. Fluoride concentration varied from 1.176mg/kg to 4.868 mg/kg in the cauliflower sample collected from site S₁, S₂, S₃, S₄, S₅, S₆, S₇, and S₈ of the Neem ka Thana, tehsil of district Sikar, Rajasthan. Fluoride estimation in the cauliflower was carried out by using selective ion meter.