According to one embodiment, an electrode is provided. The electrode includes a current collector and an active material-containing layer. The active material-containing layer includes an active material complex and a conductive agent. The active material complex includes particles of a niobium-titanium composite oxide and a carbon-containing layer. The carbon-containing layer covers at least one part of surfaces of the particles of the niobium-titanium composite oxide. A resistance value ρs·S satisfies the following formula (1). The resistance value ρs·S is calculated from a specific surface area S (m2/g) of the active material complex by a nitrogen BET method and a sheet resistance value ρs (Ω/m2) of the electrode. 1 Ω/g≤ρs·S≤50 Ω/g  (1)