Fuente: WIPO "tomato" The present invention relates to a polypeptide or a polypeptide construct comprising a domain which binds to Claudin 6 (CLDN6) and another domain which binds to CD3. Moreover, the invention provides a polynucleotide encoding the construct, a vector comprising said polynucleotide and a host cell transformed or transfected with said polynucleotide or vector. Furthermore, the invention provides a process for producing the construct of the invention, a medical use of said construct and a kit comprising said construct.