Phetchaburi MRT station (Thai: สถานีเพชรบุรี, pronounced [sā.tʰǎː.nīː pʰét.t͡ɕʰā.bū.rīː]; code BL21) is a Bangkok MRT station on the Blue Line. It is located under the junction of Asok and New Phetchaburi Road. Commuters can transfer to the Airport Rail Link at Makkasan Station, and the SRT Eastern Line at Asok Halt, located at ground level.

The station uses symbol of a water wave referring to Khlong Saen Saeb. It is an underground station, 23 metres (75 ft) wide and 200 metres (660 ft) in length, with a depth of 20 metres (66 ft), and uses island platform

There is a MetroMall in the station.

Phetchaburi station is connected to Makkasan station by a covered-elevated footpath. Fare and ticket systems between the two lines are not integrated.

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  Covered, elevated footpath connecting the MRT and SARL stations.

FB	Skywalk	Footbridge to Makkasan Station
G	-	Bus stop
B1	Basement	Exits 1–3 and Underground Mall
B2	Concourse	Ticket machines
B3	Platform 2	Blue towards Tha Phra via Bang Sue (Phra Ram 9)
	Island platform, doors will open on the right
	Platform 1	Blue towards Lak Song (Sukhumvit)

13°44′57″N 100°33′47″E / 13.7491°N 100.5630°E / 13.7491; 100.5630