Keretapi Tanah Melayu Berhad (KTMB) or Malayan Railway Limited, colloquially referred to simply as KTM, is the main rail operator in Peninsular Malaysia. The railway system dates back to the British colonial era, when it was first built to transport tin. Previously known as the Federated Malay States Railways (FMSR) the Malayan Railway Administration (MRA), and the Malayan Railway, Keretapi Tanah Melayu acquired its current name in 1962. The organisation was corporatised in 1992, but remains wholly owned by the Malaysian government.

The KTM KL Sentral–Terminal Skypark Line is a currently suspended limited express train service in Kuala Lumpur, Malaysia between Kuala Lumpur Sentral and Sultan Abdul Aziz Shah Airport. It is Malaysia's second airport rail link service, after the Express Rail Link system.