The station is an underground station and opened on 20 November 1904.
It is situated in the 2nd arrondissement. The station takes its name from the rue de Sentier (path to the city's fortification), which is close by. The architects on the project were Charles Devillard and Philippe Jolivald.
The station is served by the metro line 3.
Sentier is one of the few metro stations integrated in a building. The ironworks in the two small arches at the entrance corresponds to those of the balcony above.
The Metro sign is hanging from a horizontal pole. A large red M is stuck on a light blue open circle. Across is a light blue bar with the word METRO. The sign is lit at night.
The ceiling in the corridor consists of many arches, re-enforced by steel beams. It is painted white.
Advertising is on flat boards, or on metal frames with 'glass' as on the right side.
The walls are tiled to nearly the top and finished off with light turquoise tiles. They have a flower pattern.
Stairs to the platform. The walls are tiled in white Metro style. The border tiles are light turquoise. They have a geometric flower pattern.
View of the two platforms in direction Gallieni. The ceiling is vaulted and tiled. The original tiles on the walls have been covered with panels which incorporate the advertising, maps and signage.
Yellow plastic seats are mounted on yellow metal structures fixed underneath the panels.
Each strip light is hanging from the ceiling by its own fittings.
The ground is painted grey. A thick white line highlights the edge of the platform. Next to it is a row of tiles with raised circles.
Signage above the metro network plan. The station name is printed in upper and lower case on a blue background. The sign is in a white metal frame.