A campus is a place where students acquire knowledge from colleges in the form of lectures. Now in recent years, the concept of study space has changed from conventional form to contemporary form. The concept of learning will change from closed space learning to open space learning (Transitional spaces) in the future. Transitional spaces are spaces located in between outdoor and indoor environment acting as both buffer spaces and physical links. These spaces are mostly used for conducting various informal activities in colleges. In architecture education, formal education should be supported with informal education in order to equip students with general architectural knowledge and improve their architectural design power. Informal learning activities will help to develop the informal learning of the students. The study was undertaken to examine the effect of informal activities conducted in transitional spaces on the informal learning of architecture students. A study was conducted in Pune by selecting two architecture colleges and 90 students from these two colleges. The selection of colleges and respondent students were done purposively. The results of the study indicated that among different transitional spaces, Courtyard Amphitheatre, Common area, Students Plaza, and corridors were ranked high on the basis of the mean score. While model making, Workshop, and Students presentation were the most important learning activities. An overall increase in learning was observed in transitional spaces as against classroom situations. Informal learning is relatively more in transitional spaces and it establishes the importance of transitional spaces in Architectural education.