Siné Mensuel is a French satirical magazine, without advertising, published on the first Wednesday of each month until March 2025, when it ceased publication.

Founded by cartoonist Siné in 2011 after the demise of Siné Hebdo, it emerged in the wake of Siné's dismissal from Charlie Hebdo. The first issue, dated September 2011, sold 50,000 copies according to the magazine's website. It was published on the first Wednesday of each month. Its motto was: "The magazine that hurts, and it feels good." Siné contributed an editorial to the magazine until May 2016.

Siné Mensuel is a tabloid-sized magazine (290 × 370 mm) without staples, has 32 pages, is printed in full color, and is published by its own publishing house: Éditions du Crayon, run by Catherine Siné, Siné's wife.

Regular contributors include Christophe Alévêque, Isabelle Alonso, Jackie Berroyer, Jean-Pierre Bouyxou, Maxime Carsel, Laurent Chollet, Pierre Concialdi, Constance Delfeil de Ton, Djubaka, Gérard Filoche, Blandine Flipo, Noël Godin, Nadia Khiari, Jean-Marie Laclavetine, André Langaney, Martine Laval, Étienne Liebig, Lindingre, Guillaume Meurice, Stéphane Mazurier, François Morel, Arthur Nesnidal, Laure Noualhat, Patrick Pelloux, Serge Quadruppani, Patrick Raynal, Jean-Claude Ribaut, Jean-Jacques Rue, Claude Sérillon, Anne Crignon, Charline Vanhoenacker, Michel Warschawski, and Yannis Youlountas.

Regular contributors include Berth, Carali, Florence Cestac, Desclozeaux, Frilouz, Philippe Geluck, Jiho, KAP, Krokus, Lacombe, Lasserpe, Marie Morelle, Lefred Thouron, Zoe Thouron, LB, Lindingre, Malagon, Rémi MalinGrey, Mikaël, Muzo, Marie Morelle, MRic, Pakman, Plop & KanKr, Pinel, Sie, Sine, Soph, Soulas, Waner, Willem, and Willis from Tunis.

Following the cartoonist's death, the monthly magazine has been run by his widow, Catherine Weil Sinet, since 2016. In early 2025, the magazine's management announced its planned closure in March.