The paper assesses the influence of electromagnetic radiation produced by mobile phone on tympanic Temperature of healthy persons using instant thermometer Thermo Scan. The ear temperature was measured directly and instantly in healthy persons (both Females and males) totaling 20 in number in their relaxed condition and also immediately after the use of mobile phone in talk mode for 30 min. The subjects were of age group ranging from 18 to 50 years. It is interesting note from the data that there is no way any significant change in tympanic temperature before and immediately after the use of mobile phone.