Three main resources of school financial management problems in Indonesia · are (a) the low transparency and accountability,(b) the inappropriate procedural operating standard, and (c) the inappropriate system operational fund calculating system. This research aims at developing school financial management system. This is a research and development (R&D) which implemented three main steps, they are (a}- picturing the school financial management system, (b) developing the model, and (c) validating the models. The subjects of the study are two state junior high schools in Magelang Municipality. There are three main results of this research. The first is the real picture of the school financial management system. The second is the model or procedural operating standard for financial management, and the third is the model for calculating the schooi operatio al fund. After validated, the models are effective models.