转座病毒科（Metaviridae）又译作变化病毒科或变换病毒科，是一种拥有反转录聚合酶的病毒，型态为单链RNA。该类病毒主要感染真菌和无脊椎动物。

下有两个属：

• 变换病毒属(Metavirus)
• 漂游病毒属(Errantivirus）又译作游移病毒属、漂移病毒属。

Metaviridae are a family of viruses which exist as retrotransposons in a eukaryotic host’s genome. They are closely related to retroviruses: Metaviridae share many genomic elements with retroviruses, including length, organization, and genes themselves. This includes genes that encode reverse transcriptase, integrase, and capsid proteins. The reverse transcriptase and integrase proteins are needed for the retrotransposon activity of the virus. In some cases, virus-like particles can be formed from capsid proteins.