Considering the difficulties in finding good quality images for development and test of computer-aided diagnosis (CAD), this paper presents a public online mammographic images database free for all interested and aimed to help develop and evaluate CAD schemes. The digitalization of the mammographic images is made with suitable contrast and spatial resolution for processing purposes. The broad recuperation system allows the user to search for different images, exams or patient characteristics. Comparison with other databases currently available has show that the presented database has a sufficient number of images, of high quality and is the only one to include a functional search system.