A robot includes a first member, a second member provided to be capable of turning with respect to the first member, and a gear device configured to transmit a driving force from one side to the other side of the first member and the second member. The gear device includes an internal gear, an external gear having flexibility and configured to partially mesh with the internal gear, a wave generator configured to be in contact with the external gear and move a meshing position of the internal gear and the external gear in a circumferential direction, and lubricant disposed in at least one of a meshing section of the internal gear and the external gear and a portion where the external gear and the wave generator are in contact with each other. A last non-seizure load of the lubricant is 300 N or more.