Epidermal growth factor (EGF) is a ligand for the EGF receptor, a member of the erbB family of receptor tyrosine kinases. Activation of EGF receptor by EGF or other high-affinity ligands often results in increased migration of cells in physiological and pathological situations. There are numerous approaches for evaluating cell migratory response following EGF stimulation. Both qualitative and quantitative techniques will be presented in this chapter.