Title : A comparative study on effectiveness of mucosal vibration and topical anaesthetic gel in reducing pain during administration of local anaesthetic in paediatric patients. Introduction: Anxiety related to dentistryis not uncommon in paediatric patients. Poor pain control alongside the fear and anxiety might interfere with appropriate dental management. In this study a modified mucosal vibration device is used to modify the pain perception during LA administration. Aim: To compare the effectiveness of topical anaesthetic gel and mucosal vibration during local anaestheticadministration in children in the age group8-11 years using both subjective and objective scalescales for measuring anxiety and pain. Methodology: Thirty children who required inferior alveolar nerve blockanaesthesia for routine dental procedures were included and divided equally into 3 groups Group I- control Group II- topical anaesthetic gel Group III - Mucosal vibrator Pain perception was compared, assessed and analysed during injection using Sound, Eye, Motor (SEM) scale, Doremon cartoon modified Wong Baker Faces Pain Rating Scale, MotuPatlu cartoon modified Venham scale Results: The scores of SEM scale and Doremon pain scale when subjected to statistical analysis gave a p value <0.001. Conclusion: Mucosal vibrator is an easily availablehandyand effective chair sidedevice for pain reduction during administration of local anaesthesia for paediatric patients