Background: Immunization is the most effective method of preventing childhood diseases. Objectives: 1) To assess immunization status among children of 12-23 months age group. 2) To find out reasons of left outs / dropouts. 3) To check quality of records in immunization card. Methodology: Community based cross sectional study was conducted at nine villages of seven sub centers of two Primary Health Centers from one block of rural Ahmedabad during October 2011 to January 2012. Performa was prepared on the basis of government immunization card. Information was assessed mainly from immunization card else by directly asking to mother / guardian whenever card was unavailable. Data of 120 eligible children was collected. Results: Immunization card was available for 100(83%) children, among them 89(74%) was government and 11(9%) was private card. Date of birth was noted in card for 94(78%) and birth weight for 62(52%) of children. Out of 120 children, 118(98%) had taken BCG vaccine. BCG scar was seen in 91% of available children. Proportion of fully immunized was 74%, while that of partially immunized was 26%. Gender difference in immunization status was not significant (P=0.59). Vaccine dropout was highest for DPT1- 3(20%) followed by DPT1-measles (16%). Common reasons of partially immunization were off place (22%), not aware (20%) and sick child (20%). Major source of vaccination was PHC (53%). Growth mapping was seen in 68% of card. Conclusion: In spite of good coverage (>80%), dropout rate was high (>10%). Relevant steps should be taken to improve vaccine utilization as well as documentation in card.