A robot is provided. The robot includes a lower module includes a wheel and a motor provided inside the lower module, and an upper module disposed at an upper portion of the lower module and including a trash can assembly and a display unit. The upper module includes a body part coupled to the upper portion of the lower module and a head part rotatably coupled to an upper portion of the body part. The body part includes a front case forming a front outer appearance of the body part and including the trash can assembly provided inside the front case, and a rear case forming a rear outer appearance of the body part and including the display unit.