The present invention provides a hypoglycemic agent useful for treating diabetes or other similar diseases which has no adverse effects. Furthermore, the present invention provides a hypoglycemic agent comprising a combination of an antidiabetic drug and 2-methyl-2-[(4-{(IE)-3-[2-(4-methylbenzoyl)-lH-pyrrol-l-yl]prop-l-en-l-yl}benzyl)oxy]propanoic acid or a pharmaceutically acceptable salt thereof.