Petrache Poenaru, formerly known as Semntoarea is a metro station in Bucharest, Romania, servicing the Bucharest Metro Line M1. It was named after Semntoarea, an agricultural machinery factory located in the vicinity, but it is now named after Petrache Poenaru, a Romanian inventor of the Enlightenment era. The metro station services both what is left of the factory (that was severely downsized a number of times), part of the Regie student campus located in the vicinity, the Sema Park industrial Park, as well as some newly built residential areas.

The station was designed with relatively little traffic in mind; it has a central-track design with two narrow platforms on each side of the tracks. The station opened on 19 November 1979, initially as a temporary terminus of the first subway line of Bucharest, making it one of the initial 6 stations of the Bucharest Metro to enter commercial service, from Semntoarea to Timpuri Noi. On 22 December 1984, the line was extended further to Crngai. It is also located close to the Semntoarea (Ciurel) Metro Depot.

The walls of the Petrache Poenaru metro station are made of yellow and beige tiles with the floor being built in uniform yellow mosaic pieces. The station entrance is unusual in that it faces the street at an angle of 90 degrees and is just a few metres from the road. It was one of the least used stations in the city at some point, but recently, industrial and residential projects in the area have increased the station's usage.

The Bucharest Metro (Romanian: Metroul din București) is an underground rapid transit system that serves Bucharest, the capital of Romania. It first opened for service on 16 November 1979. The network is run by Metrorex. One of two parts of the larger Bucharest public transport network, Metrorex has an average of approximately 720,000 passenger trips per weekday (as of 2018), compared to the 1,180,000 daily riders on Bucharest's STB transit system. In total, the Metrorex system is 78 kilometres (48.5 mi) long and has 62 stations.