弹尾目（学名：Collembola），通称跳虫目或弹尾虫，是属于内口纲的小型节肢动物，以往曾被列入昆虫纲的无翅亚纲，现在通常与另外两个原本属于昆虫纲的原尾目及双尾目合并为内口纲。而内口纲虽然与昆虫类似，但不再列入昆虫类。

弹尾目无翅，长在5毫米以下。善于跳跃，分布很广。常生活在潮湿处，如落叶下、石下、青苔间、地面、水边或积水地面上、腐植土中、蚁与白蚁巢穴中，雪地上也有发现以腐植质、菌类、地衣为主要食物，有些种类为害活的植物的种子、根茎、嫩叶，被认为是农作物及园艺作物的害虫。

Springtails (Collembola) form the largest of the three lineages of modern hexapods that are no longer considered insects (the other two are the Protura and Diplura). Although the three orders are sometimes grouped together in a class called Entognatha because they have internal mouthparts, they do not appear to be any more closely related to one another than they all are to insects, which have external mouthparts.