花格贝母（学名：Fritillaria meleagris）是百合科贝母属的植物，又名阿尔泰贝母、小贝母、珠鸡斑贝母、蛇头贝母。

花格贝母的花朵呈红褐色、紫色及灰色，有时会是白色的。花期3－5月，高15－40厘米。鳞茎圆形，直径约2厘米，内含有毒的生物碱。

Fritillaria meleagris is a Eurasian species of flowering plant in the lily family. Its common names include snake's head fritillary, snake's head (the original English name), chess flower, frog-cup, guinea-hen flower, guinea flower, leper lily (because its shape resembled the bell once carried by lepers), Lazarus bell, chequered lily, chequered daffodil, drooping tulip or, in northern Europe, simply fritillary.