A pre experimental research was conducted on 60 primipara mothers to evaluate the effectiveness of planned teaching programme regarding complementary feeding in selected villages of Mohali, The data was collected by closed ended knowledge questionnaire and 't' test and chi square were used for statistical analysis. The result shows that post-test mean score was 28.18 which is higher than the pre- test mean score (12.38). The obtained 't' value was 37.525 which is significant at 0.05 level. It shows that the planned teaching programme was effective as majority of primipara mothers had adequate knowledge regarding complementary feeding after teaching.