Cemented carbide and cutting tool including same as substrate

A cemented carbide comprising a first hard phase, a second hard phase, and a binder phase, wherein

• the first hard phase is composed of tungsten carbide grains,
• the second hard phase is composed of carbide grains including niobium or tantalum as a constituent element,
• the binder phase includes cobalt, nickel, and chromium as constituent elements,
• at least part of the carbide grains of the second hard phase further include tungsten as a constituent element, and
• a ratio A/B of A volume % representing a volume ratio of the second hard phase to the cemented carbide to B volume % representing a volume ratio of a total of a niobium element and a tantalum element to the cemented carbide is more than 1.2,
• wherein mass ratio of cobalt is 40 mass % or more and 80 mass % or less, mass ratio of chromium is 10 mass % or more and 20 mass % or less, and mass ratio of nickel is 10 mass % or more and 40 mass % or less, each said mass ratio with respect to total mass of the binder phase.