The technological pedagogical content knowledge framework is increasingly in use by educational technology researcher as a generic description of the knowledge requirements for teachers using technology in all subjects. This study describes the development of a mathematics specific variety of the technological pedagogical content knowledge framework. The paper showed how a particular conception of the knowledge required to teach mathematics can be integrated with the technological pedagogical content knowledge framework as the basis for understanding technology integrated mathematics teaching. The resulting framework provides a sharper lens than the generic technological pedagogical content knowledge framework alone and a better understanding of the knowledge required for teachers of mathematics to use technology in their teaching. The study illustrated how the framework may be useful for analysing the knowledge demands of particular mathematics teaching tasks, and for planning appropriate professional development for integrating technology in the teaching of mathematics.