LEGO Rock Band is a music video game, part of the Rock Band series developed by Harmonix, that incorporates elements from Lego video games developed by Traveller's Tales. The game is published by Warner Bros. Interactive Entertainment and MTV Games.

The game, as with other games in the Rock Band series, allows up to four players to use instrument controllers to playlead and bass guitar, drums, and vocals on a number of rock music songs. In addition, aspects of building with Legobricks are incorporated into the game, allowing players to customize their avatars and other band assistants, and include additional Lego-themed gameplay modes. The gameplay and the game's 45-song soundtrack has been selected to create a "family-friendly" game. Players are able to export the songs from the game into other Rock Bandtitles, while downloadable content that passes family-friendly filters can be incorporated into the game; however, songs released after Rock Band 3 are not compatible due to changes in the song format.

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