This paper studies synchronization in an array of diffusively coupled identical memristor Chua’s circuits (MCCs). We start from the de- scription of MCCs in the flux-charge domain and the state space decomposition in invariant manifolds and then we apply three different techniques, of numerical and analytic nature, for finding the synchronization condition in terms of a circuit parameter. Pros and cons of the three techniques are discussed and some ideas for extending the obtained results are provided.