蜻蛉目（学名：Odonata）的昆虫主要包括蜻蜓和豆娘。这些昆虫有着硕大的复眼、两对强而有力的透明翅膀, 与及修长的腹部。

大型肉食性飞虫。头部灵活，复眼发达，单眼3个。触角短，4-7节。翅膀4翼，细长。腹部修长。不完全变态，稚虫水栖，无蛹期。 蜻蛉目的昆虫包含「豆娘」和「蜻蜓」二大类，种类繁多，**已知的约有142种。细长的身体和二对透明的翅膀是牠们的共同特征，再加上一对大复眼。豆娘和蜻蜓很相似，只是体形较为「苗条」！而且豆娘的复眼明显分得较开，头部的形状看起就像一个哑铃一样。停栖时，大部分豆娘的翅膀会合并竖立在身体的胸部背侧。

Odonata is an order of carnivorous insects, encompassing the dragonflies (Anisoptera) and the damselflies (Zygoptera). The Odonata form a clade, which has existed since the Triassic.

Dragonflies are generally larger, and perch with their wings held out to the sides; damselflies have slender bodies, and hold their wings over the body at rest.