ELECTRICAL CONNECTION BOX AND WIRE HARNESS

An electrical connection box includes: a frame accommodating electronic components; and a lower cover located below the frame and closing a lower opening. The frame includes double walls including a first outer wall and a first inner wall and formed along the lower opening. The lower cover includes: a second outer wall located between the first outer wall and the first inner wall in a placement state; and a second inner wall formed inside the second outer wall and along the second outer wall. The first inner wall includes: a body formed in such a manner that a lower end is located between the second outer wall and the second inner wall in the placement state; and a bulge protruding toward the first outer wall from an opposed surface, being opposite to the first outer wall, of the body.