The Belle detector at the KEKB asymmetric e⁺e^- collider is not only an excellent experimental environment for the measurements connected to the neutral and charged B mesons, but also a rich source of different hadronic states containing charm quarks. We present discoveries of new and property measurements of several recently observed such hadron states. Some of them pose questions regarding their nature and represent a challenge for the description in terms of QCD. Specifically we address the properties of D_sJ mesons, newly observed X(3872) and Y(3940) states, analysis of the hadrons produced in association with a c\overline {c} system and searches for possible pentaquark states.

PACS numbers: 13.66.Bc, 13.25.Jx, 13.25.Ft, 13.25.Gv