Cutting tool

A cutting tool, comprising a substrate and a coating disposed on the substrate,

• wherein the coating comprises a first layer,
• the first layer consists of multiple hard particles,
• the hard particles consist of titanium, silicon, carbon, and nitrogen,
• the hard particles have a cubic crystal structure,
• the first layer has a columnar structure,
• in the first layer, an average of a ratio of the number of atoms of the silicon NSi to a sum of the number of atoms of the titanium NTi and the number of atoms of the silicon NSi, NSi/(NTi+NSi), is 0.010 or more and 0.10 or less,
• the hard particles have a lamellar structure in which a content of the silicon changes periodically,
• in a first graph showing results obtained by subjecting the hard particles to line analysis along a stacking direction of the lamellar structure with an energy dispersive X-ray spectroscope attached to a transmission electron microscope, in a coordinate system having X-axis indicating a distance from any point, P1, in the hard particles, and Y-axis indicating the ratio NSi/(NTi+NSi),
• each cycle of the ratio NSi/(NTi+NSi) includes a first minimum value, a first maximum value, a second minimum value, a second maximum value, and a third minimum value along the positive direction of the X-axis, and
• an average of the second minimum values is higher than an average of the first minimum values and the third minimum values.