An ice maker includes an upper assembly including a plurality of hemispherical upper chambers, a lower assembly disposed below and pivotably coupled relative to the upper assembly, wherein the lower assembly includes a plurality of hemispherical lower chambers, a driver configured to pivot the lower assembly, a pair of rotating parts disposed at both sides of the lower assembly, a first pivoting arm pivotally mounted on one of the rotating parts, a second pivoting arm pivotally mounted on the other of the rotating parts and connected to the driver, a connection shaft connecting the first pivoting arm to the second pivoting arm, a first elastic member having one end connected to the first pivoting arm and the other end connected to the lower assembly, and a second elastic member having one end connected to the second pivoting arm and the other end connected to the lower assembly.