The present invention relates to T cell receptors (TCRs) which bind the HLA-A2 restricted FMNKFIYEI (158-166) peptide epitope derived from α Fetoprotein (AFP). Certain preferred TCRs of the invention demonstrate excellent binding characteristics and specificity profiles for this AFP epitope. T cell receptors of the invention comprise at least one TCR alpha chain variable domain and/or at least one TCR beta chain variable domain, the alpha chain variable domain comprising an amino acid sequence that has at least 90% identity to the sequence of amino acid residues 1- 112 of SEQ ID No : 2, and/or the beta chain variable domain comprising an amino acid sequence that has at least 90% identity to the sequence of amino acid residues 1- 112 of SEQ ID No : 3.