A bionic finger and a mechanical hand. The bionic finger comprises: a base (8); a first finger segment (7), rotatably connected to the base (8) by means of a first hinge part (9); a second finger segment (11), rotatably connected to the first finger segment (7) by means of a second hinge part (6); a third finger segment (1), rotatably connected to the second finger segment (11) by means of a third hinge part (3); a first connecting rod (12), having one end rotatably connected to the base (8) by means of a fourth hinge part (13) and the other end rotatably connected to the second finger segment (11) by means of a fifth hinge part (4); and a second connecting rod (10), having one end rotatably connected to the first finger segment (7) by means of a sixth hinge part (5) and the other end rotatably connected to the third finger segment (1) by means of a seventh hinge part (2). The bionic finger has high flexibility.
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