Novice-expert school teachers' conflicts and support significantly contribute to the working relationship, teaching performance and retention. The present study aims to phenomenologically analyze novice-expert school teachers' experiences of mutual support and conflicts and how it helps their professional development. Seven expert and seven novice teachers were purposively selected from private and public schools from a district located in Punjab, Pakistan, who were interviewed to gain an insight into the phenomenon. The collected data were transcribed and analyzed employing thematic analysis guided by the selected qualitative approach. It was revealed from the themes and sub-themes that novice teachers get support from the expert teachers, and they developed self-confidence and techniques to manage a classroom, solve students' problems and adjust themselves in the school successfully. The study implies that the conflicts between novice and experienced teachers can be resolved through promoting mutual understanding, cooperation, and communication.