喙嘴翼龙亚目（Rhamphorhynchoidea）又名喙嘴龙亚目，是翼龙目两个亚目之一，代表翼龙目的原始阶段。喙嘴翼龙亚目是并系群，翼手龙亚目从喙嘴翼龙类演化而来，而非更直系的共同祖先。因为喙嘴翼龙亚目并非完全自然的生物群，大多数科学文献并不使用此名词并，但还是被某些翼龙专家用在大众作品里，例如大卫·安文（David Unwin）在2006年的《The Pterosaurs: From Deep Time》一书。喙嘴翼龙类是第一批出现的翼龙类，出现于晚三叠纪的诺利阶。大多数喙嘴翼龙类有牙齿与长尾巴，大多数物种缺乏冠饰，这些特点不像牠们的的翼手龙类后代，但几个喙嘴翼龙类有由软组织如角质所形成的冠饰。喙嘴翼龙类通常较小，牠们的手指仍然用来攀抓。

The Rhamphorhynchoidea forms one of the two suborders of pterosaurs and represent an evolutionary grade of primitive members of this group of flying reptiles. This suborder is paraphyletic in relation to the Pterodactyloidea, which arose from within the Rhamphorhynchoidea, not from a more distant common ancestor. Because it is not a completely natural grouping, Rhamphorhynchoidea is not used as a formal group in most scientific literature, though some pterosaur scientists continue to use it as an informal grouping in popular works, such as The Pterosaurs: From Deep Time by David Unwin, and in some formal studies. Rhamphorhynchoids were the first pterosaurs to have appeared, in the late Triassic Period (Norian age, about 210 million years ago). Unlike their descendants the pterodactyloids, most rhamphorhynchoids had teeth and long tails, and most species lacked a bony crest, though several are known to have crests formed from soft tissue like keratin. They were generally small. Nearly all had become extinct by the end of the Jurassic Period, though least one anurognathid genus, Dendrorhynchoides, persisted to the early Cretaceous. The family Wukongopteridae, which shows a mix of rhamphorynchoid and pterodactyloid features, is known from the Daohugou Beds which are most commonly dated to the Jurassic, but a few studies give a Cretaceous date. Further more, remains of a non-pterodactyloid from the Candeleros Formation extend the presence of basal pterosaurs into the at least early Late Cretaceous.