A waterproof electric connector module includes an insulated housing, an electric connector, a blocking plate, and a sealed structure. The insulated housing is formed in an elongated shape. A front entry and a rear entry are individually formed on two end sides of the insulated housing and disposed aligned with each other. A side opening is formed on a side of the insulated housing and communicates with the rear entry. The electric connector is disposed in the insulated housing and has a plurality of terminals which extend and protrude from the side opening. The blocking plate blocks the rear entry. The sealed structure fills and seals the side opening. The terminals individually penetrate through the sealed structure. The waterproof housing can be sealed through the blocking plate and the sealed structure.