A charging coupler has a grip, an electrical connector and a cable holder. The grip has a front opening and a rear opening on two ends thereof The grip has a first half-tube and a second half-tube connected with each other along a longitudinal direction thereof. The first half-tube has a first latch portion and a groove extending along edges thereof to connect the second half-tube. The second half-tube has a second latch portion and a rib extending along edges thereof to connect the first half-tube. The rib is substantially matched with the groove, and a sealant is filled in a gap between the rib and the groove. The first latch portion is latched with the second latch portion to tighten connection of the first half-tube and the second half-tube. The electrical connector is arranged on the front opening, and the cable holder is arranged on the rear opening.