A surfboard is a narrow plank used in surfing. Surfboards are relatively light, but are strong enough to support an individual standing on them while riding an ocean wave. They were invented in ancient Hawaii, where they were known as papa he'e nalu in the Hawaiian language, and were usually made of wood from local trees, such as koa. They were often over 460 cm (15 ft) in length and extremely heavy. Major advances over the years include the addition of one or more fins (skegs) on the bottom rear of the board to improve directional stability, and numerous improvements in materials and shape.

लहरतख़्ता या सर्फ़बोर्ड उस फट्टे को कहते हैं जिसका प्रयोग लहरबाज़ी (सर्फ़िन्ग) के खेल में समुद्र की लहरों पर सवारी करने के लिए किया जाता है। लहरतख़्ते हलके होते हैं ताकि लहरबाज़ उन्हें आसानी से उठा सकें और अगर सवारी करते हुए वे गिर जाएँ तो तख़्ते की ठोकर से अधिक चोट न लगे। इस हल्केपन के बावजूद वे मज़बूत भी होते हैं ताकि सवार हुए लहरबाज़ का भार उठा सकें।