The Portinari Altarpiece or Portinari Triptych is an oil-on-wood triptych painting by the Flemish painter Hugo van der Goes, commissioned by Tommaso Portinari, representing the Adoration of the Shepherds. It measures 253 x 304 cm, and is now in the Galleria degli Uffizi in Florence, Italy. This altarpiece is filled with figures and religious symbols. Of all the late-fifteenth-century Flemish artworks, this painting is said to be the most studied.

A triptych is a work of art that is divided into three sections, or three carved panels that are hinged together and can be folded shut or displayed open. It is therefore a type of polyptych, the term for all multi-panel works. The middle panel is typically the largest and it is flanked by two smaller related works, although there are triptychs of equal-sized panels. The form can also be used for pendant jewelry.