An electrical junction box comprising: a body case of the electrical junction box that has an opening part facing electrical components and has a case side locking part (9, 13); and a cover that covers the opening part, is engaged to the body case of the electrical junction box, and has a cover side locking part (19, 23) including a locking body and a pair of protective walls, wherein the cover is engaged to or disengaged from the body case of the electrical junction box with the case side locking part (9, 13) and the cover side locking part (19, 23), the cover has a cover side abutting part (20, 24) to match a position of the cover side locking part (19, 23), the body case of the electrical junction box has a case side abutting part (10, 14) to match a position of the case side locking part (9, 13) and a position of the cover side abutting part (20, 24), the cover side abutting part (20, 24) and the case side abutting part (10, 14) are formed and arranged at positions where the cover side abutting part (20, 24) and the case side abutting part (10, 14) abut against each other when the opening part is covered with the cover and the cover is moved in a predetermined direction that intersects an engaging direction in which the cover is engaged to or disengaged from the body case of the electrical junction box; the cover and the body case of the electrical junction box have a cover side supporting part and a case side supporting part, and the cover side supporting part and the case side supporting part are formed to, when the cover is moved in the engaging direction while the cover side abutting part (20, 24) abuts against the case side abutting part (10, 14), guide the movement, characterized in that the cover side supporting part and the case side supporting part are formed and arranged at positions to sandwich the cover side locking part (19, 23) and the case side locking part (9, 13) with the cover side abutting part (20, 24) and the case side abutting part (10, 14). a body case of the electrical junction box that has an opening part facing electrical components and has a case side locking part (9, 13); and a cover that covers the opening part, is engaged to the body case of the electrical junction box, and has a cover side locking part (19, 23) including a locking body and a pair of protective walls, wherein the cover is engaged to or disengaged from the body case of the electrical junction box with the case side locking part (9, 13) and the cover side locking part (19, 23), the cover has a cover side abutting part (20, 24) to match a position of the cover side locking part (19, 23), the body case of the electrical junction box has a case side abutting part (10, 14) to match a position of the case side locking part (9, 13) and a position of the cover side abutting part (20, 24), the cover side abutting part (20, 24) and the case side abutting part (10, 14) are formed and arranged at positions where the cover side abutting part (20, 24) and the case side abutting part (10, 14) abut against each other when the opening part is covered with the cover and the cover is moved in a predetermined direction that intersects an engaging direction in which the cover is engaged to or disengaged from the body case of the electrical junction box; the cover and the body case of the electrical junction box have a cover side supporting part and a case side supporting part, and the cover side supporting part and the case side supporting part are formed to, when the cover is moved in the engaging direction while the cover side abutting part (20, 24) abuts against the case side abutting part (10, 14), guide the movement,