The largest public collection of works by Castejón is gathered at the Museum of Contemporary Art in his hometown Elche. The largest private collection was the collection Lecasse Foundation in Alcoy, containing about two hundred works acquired by businessman Lionel Grau Mullor during the eighties and nineties. Currently this collection was divided among his heirs. The collection of drawings dedicated to Don Quixote belong to the IVAM. Another good part of Parts is in the collection of Foundation Bancaja, Valencia.