Objective - The objective of research was to determine the intergovernmental relation in public transport services. It also aims to identify the inter-governmental Relation in the service of Batik Solo Trans viewed from the cooperation type, the cooperation process and examined using three aspects: sharing of benefits, sharing of burden and sharing of experience. Methodology/Technique - The research method was qualitative descriptive one with interview and documentation as the technique of collecting data. The sampling technique used was purposive sampling on. Data validation was carried out using method triangulation and data analysis using an interactive data analysis. Findings – Considering the result of research, it could be found that the type of inter- Governmental Relation in BST Service was the collective agreement without certain pact document. The cooperation process was done in coordinative manner. The cooperation showed the existence of benefit sharing between the areas involved. Besides, cooperation was also used as the media of sharing experiences, but it didn't show the distribution of responsibility. Novelty - The study recommends that there should be an agreement document specifically governing the intergovernmental cooperation in BST service, enabling the sharing of burdens so that the cooperation can be proposed with the distribution of responsibility between the areas involved. Type of Paper - Empirical Keywords: Inter-Regional Relation; Cooperation; Public Transport Service, City Bus. JEL Classification: O18, O31.