An antibody binding to IL33R characterized in that the heavy chain variable domain comprises a CDR3 region of SEQ ID NO: l, a CDR2 region of SEQ ID NO:2 and a CDRl region of SEQ ID NO:3 and in that the light chain variable domain comprises a CDR3 region of SEQ ID NO:4, a CDR2 region of SEQ ID NO:5 and a CDRl region of SEQ ID NO:6 or a a chimeric, humanized or T cell epitope depleted antibody variant thereof has advantageous properties for the treatment of inflammatory diseases.