Electrical connection box

An electrical connection box comprising:

• a housing having a space therein to house one or more electronic components;
• a firm fixing portion that firmly fixes the housing to a fixation target, the firm fixing portion being formed on the housing;
• and
• a temporary fixing projection that is formed on the housing and projects from a housing outer circumferential surface of the housing, and that temporarily fixes the housing to the fixation target by being inserted into a temporary fixing hole formed on the fixation target, wherein
• the temporary fixing projection includes:
• a main body that projects from the housing outer circumferential surface and is formed in a tubular shape;
• and
• a locking portion and a plate spring portion are arranged on the temporary fixing projection such that the locking portion and the plate spring portion face each other in a radial direction with the main body interposed between the locking portion and the plate spring portion, the locking portion and the plate spring portion each projecting from the housing outer circumferential surface,
• the locking portion has a locking claw capable of being in contact with the fixation target in an insertion direction where the temporary fixing projection is inserted into the temporary fixing hole, such that the housing is temporarily fixed to the fixation target, and
• the plate spring portion has a flat surface that extends in the insertion direction, and is configured to elastically deform inwards toward the main body by an external force, and the flat surface is configured to contact the fixation target when the housing is temporarily fixed to the fixation target.