This study investigated the effect of using a comic-based learning module in Physics as a learning tool on students' conceptual understanding and motivation. A mixed method approach using a quasi-experimental pre-test-post-test design was used in this study. An adapted 50-multiple choice test items and the physics version of the "Science Motivation Questionnaire-II' (SMQ-II) were used to measure changes of students" conceptual understanding and motivation respectively. Two intact classes of 68 Grade 8 students in a public school in Cavite, the Philippines participated in this study with corresponding parental consent. Quantitative data were analyzed using Paired-Sample t-test and qualitative data were gathered from students' interviews. After the integration of the comic-based learning module for 4 weeks, results showed that it provided significant increase on students' conceptual understanding in Physics. Meanwhile, the four components of students' motivation such as intrinsic motivation, self-efficacy, self-determination, and grade motivation showed significant increase. Finally, students' learning experience on the use of the module as revealed on focus group discussion showed that the module helped them to understand better the Physics topics being discussed and to become more motivated to learn Physics. Future studies would have to consider the appropriateness and suitability of comic-based learning module in other subject areas and grade levels.