This study aims to produce instructional media of petty cash fund with Borland Delphi 7.0 application in the Finance Administration subject, Managing Petty Cash Fund material in class XII APK in Vocational High School (SMK) Negeri 1 Pasuruan, East Java, Indonesia. This study used "Research and Development" (R&D) design procedures through 10 steps, which are: (1) potentials and problems, (2) data collecting, (3) design product, (4) design validation, (5) design revision, (6) product try-out, (7) product revision, (8) field testing, (9) product revision, and (10) mass production. Based on the results of expert validation and try-out in small scale, it was obtained the average score of media expert was 92.86% and media expert was 95.58% and small scale try-out was 98.61% which indicated that the media were categorized as valid and applicable. For the product effectivity based on the achievement test, the experimental class obtained 91.03 and control class 84.59, so that the media were effective to use. Therefore, Finance Administration teacher is suggested to use the media as an alternative learning support.