The study was designed to evaluate the effectiveness of educational intervention on knowledge and attitude regarding mentally ill rights among nursing students. The aims of the study were to enhance the knowledge and attitude of nursing students regarding the rights of mentally ill clients. The objectives of the study were to assess the knowledge and attitude among nursing students regarding the rights of mentally ill clients, to assess the effectiveness of educational intervention on knowledge and attitude among nursing students regarding the rights of mentally ill clients, and to find the association between the level of pre-test knowledge score and attitude score with their selected demographic variables. A pre-experimental, one group pre-test post-test design was adopted for the study. The accessible population for the study consists of G.N.M. second year nursing students. The sample was conducted at Rohilkhand School of Nursing, Bareilly. 50 samples were collected by a convenient sampling technique. Data was collected using self structured knowledge questionnaires and a five point Likert scale. The collected data was organized in a master data sheet and analyzed using descriptive and inferential statistics as per the objectives of the study. The study revealed that in the pre-test score, none of the nursing students had adequate knowledge, 96% (48) of nursing students had moderate knowledge, and 4% (02) nursing students had inadequate knowledge regarding the rights of mentally ill clients. In the post-test, 92% (46) of nursing students had adequate knowledge, 8% (04) nursing students had moderate knowledge, and none of the nursing students had inadequate knowledge regarding the rights of mentally ill clients. In the pre-test score, 2% (01) nursing students had a favorable attitude, and 98% (49) of nursing students had moderately favorable attitudes. In the post-test, 96% (48) of nursing students had a favorable attitude, 4% (02) nursing students had moderately favorable attitudes, and none of them had unfavorable attitudes regarding the rights of mentally ill clients. The study shows that a structured teaching program was effective to improve the level of knowledge and attitude of nursing students.