The experimental evidence for existence of cluster and molecular states in 10 Be, 10 B and 10 C is presented in details. For the most studied of the three, 10 Be, a rotational band have recently been firmly identified, with states having rather large moment of inertia. For the isobaric analogue states in 10 B first experimental results have been obtained and presented; some simple predictions for the 10 C nucleus are also given.