笋瓜（学名：Cucurbita maxima）为葫芦科南瓜属的植物。

一年生草本。圆筒形茎蔓生，组织较松。叶片形状近似南瓜，而尖端圆钝，无白斑。黄色花冠先端钝圆，裂片小，萼片细长。圆筒形的果实，有淡黄、橘红等色。果面平滑，黄褐或淡黄色的果肉，含糖少。果柄圆而无棱，基部不膨大。

Cucurbita maxima, one of at least five species of cultivated squash, is one of the most diverse domesticated species. This species originated in South America from the wild Cucurbita andreana over 4000 years ago. The two species hybridize quite readily but have noticeably different calcium levels.