There is provided an electric junction box for ensuring a watertight performance even when a harness with various thickness is applied, including a box body, a tubular guide portion projecting from the box body and guiding a harness out of the box body, wherein the guide portion is provided with a plurality of wall portions, divided along the axial direction of the guide portion, and at least one of the wall portions is provided with a movable spurtle as a spurtle and a bending portion formed between the movable spurtle and the box body elastically deformable in the outside direction of the guide portion, and wherein the inner diameter of the guide portion in neutral state that the bending portion is not in elastic deformation is formed to fit the harness with a minimum outer diameter.