Excavation bucket and work vehicle

An excavation bucket attached to an arm of a work machine to excavate excavation material by penetrating into the excavation material, said excavation bucket comprising:

• a bottom face part having a shape that is curved in a side view;
• a rear face part linked to the bottom face part;
• a pair of opposing side wall parts that cover sides of a space bounded by the bottom face part and the rear face part;
• a cutting blade fixed to an end of the bottom face part that forms an edge of an opening of a space formed by the pair of side wall parts and the bottom face part and rear face part;
• a bracket fixed to the rear face part, a hole being disposed in the bracket for receiving an attachment pin for attaching to the arm;
• and
• a target penetration depth display component provided around the cutting blade and near an end of the side wall part that forms the edge, and that displays a target penetration depth into the material, the target penetration depth display component having an arcuate notch formed in an upper edge of one of the side wall parts, the notch overlapping a side wall cutter fixed to the same side wall part as the notch when viewed from a side of the work machine,
• the target penetration depth display component displaying a penetration depth such that a fill ratio of the excavation bucket is at least 88% and no more than 105%, and
• the excavation bucket having a wrist radius, the wrist radius being an imaginary line segment that connects a center of the hole in the bracket and a distal end of the cutting blade in a side view, the target penetration depth display component being provided to an inside of at least one of the pair of opposing side wall parts and at a position of the side wall part corresponding to a position that has moved along the imaginary line segment from the distal end toward the hole by a specific percentage of a length of the wrist radius.