ELECTRIC BRAKE SYSTEM

Disclosed is an electric brake system. The disclosed electric brake system includes: a reservoir; an integrated master cylinder including a master piston, a master chamber, and a pedal simulator; a liquid pressure supply device; a first hydraulic circuit controlling a flow of a pressurized medium supplied to a first wheel cylinder and a second wheel cylinder; a second hydraulic circuit controlling a flow of a pressurized medium supplied to a third wheel cylinder and a fourth wheel cylinder; a single backup path of which one end is connected to the master chamber, and the other end is connected to any one of the first and second hydraulic circuits; a cut valve provided in the backup path; and a connection path connecting the first hydraulic circuit and the second hydraulic circuit, and the connection path and the other end of the backup path are in communication with each other.