Background: Immunization is one of the most well-known and effective methods of preventing childhood diseases. With the implementation of the Universal Immunization Programme (UIP) by the Government of India, signicant achievements have been made in preventing and controlling vaccine-preventable diseases (VPDs). Aims & Objectives: The present study was undertaken:- 1. To know complete immunization of children against vaccine preventable diseases under Universal Immunization Programme. 2. To know month-wise trend of immunization of children against vaccine preventable diseases under UIP. Materials and methods: This is an Institutional based study and have been conducted in Shri Shivram Nathuji Tak Government Satellite Hospital st st Mandore, Jodhpur, Rajasthan from 1 January 01, 2020 to 31 December 2020. All the children who have been immunized during this period are included in the study. Results: During our study period of 12 months, a total of 575 children between the age of 0-1 year have been immunized. Minimum number of children (48) have been immunized in the month of February and March 2020. For the Pentavalent- 2, maximum number of children (82) have been immunized in the month of May 2020 and minimum number of children (43) have been immunized in the month of October 2020.