Argo Semeru (Indonesian: Kereta api Argo Semeru) is an executive and sleeper carriage class train that operated by PT Kereta Api Indonesia in Java with the route Gambir Station (GMR)–Surabaya Gubeng Station (SGU) and vice versa (via Purwokerto–Yogyakarta).

[1] The train covers 821 kilometres (510 mi) in 10 hours and 32 minutes.

[2] The Argo Semeru train was launched on June 1 2023, to coincide with the implementation of the 2023 train travel chart (Gapeka 2023).

Unlike the Bima train which is served on an evening schedule, the Argo Semeru train serves on a morning schedule.

The word "Argo" (Javanese of "mountain") is a brand name of superior executive train services by PT KAI.