A protein complex that binds interleukin-3; comprises an alpha and a beta subunit. The alpha chain is specific to the interleukin-5 receptor, whereas the beta chain is shared with the receptors for granulocyte-macrophage colony-stimulating factor and interleukin-3. [ http://www.ncbi.nlm.nih.gov/pubmed/11839579 http://www.ncbi.nlm.nih.gov/pubmed/11312115 ]