Vehicular door structure

A vehicular door structure comprising:

• a door outer panel;
• and
• a door inner panel that is made of a resin, the door inner panel comprising:
• a first side that is opposed to the door outer panel;
• a second side that is opposed to a door interior member, the door interior member facing a vehicle interior;
• and
• a panel part that has a plurality of fragile portions that are more fragile than other portions of the panel part, the fragile portions being formed as grooves, holes or concave portions, and being provided in parallel with each other while being spaced from each other in at least one direction of a door width direction and a door vertical direction, wherein
• each of the fragile portions have a linear shape or dotline shape,
• each of the fragile portions having the linear shape or the dotline shape defines a line extending in a first direction, and
• the door inner panel has a rib having a higher rigidity than the fragile portion and portions of the panel part other than the fragile portion, the rib is provided between fragile portions located adjacent to each other,
• the rib is not provided on the lines defined by the fragile portions, and
• the rib is provided between adjacent fragile portions and connects the adjacent fragile portions, the rib extending in a second direction, different from the first direction.