A robot hand apparatus (8, 8A, 8B, 8C, 8D, 8E), comprising: a supporter (38, 38E); a first holder (40, 40A, 40B, 40C, 40D) with a proximal end thereof supported by the supporter (38, 38E), the first holder (40, 40A, 40B, 40C, 40D) having a first sucking surface (44, 44C) that is bendable at any position and that sucks an object using negative pressure; and a second holder (42, 42A, 42B, 42C, 42D) with a proximal end thereof supported by the supporter (38, 38E), the second holder (42, 42A, 42B, 42C, 42D) having a second sucking surface (46, 46C) that is bendable at any position and that sucks the object using negative pressure, wherein the first holder (40, 40A, 40B, 40C, 40D) and the second holder (42, 42A, 42B, 42C, 42D) are arranged such that, when the apparatus does not hold the object, the first sucking surface (44, 44C) opposes the second sucking surface (46, 46C), wherein, when the first holder (40, 40A, 40B, 40C, 40D) and the second holder (42, 42A, 42B, 42C, 42D) hold the object, in a state in which the first sucking surface (44, 44C) is bent at a first position and the second sucking surface (46, 46C) is bent at a second position, the object is sucked to a region of the first sucking surface (44, 44C) between the first position and a distal end of the first holder (40, 40A, 40B, 40C, 40D), and the object is sucked to a region of the second sucking surface (46, 46C) between the second position and a distal end of the second holder (42, 42A, 42B, 42C, 42D), and wherein the first holder (40, 40A, 40B, 40C, 40D) and the second holder (42, 42A, 42B, 42C, 42D) are formed of an elastic material, characterized in that the first holder (40, 40A, 40B, 40C, 40D) and the second holder (42, 42A, 42B, 42C, 42D) are configured such that, when the distal ends (40b, 42b) of the first holder (40, 40A, 40B, 40C, 40D) and the second holder (42, 42A, 42B, 42C, 42D) are pressed to the object, the first sucking surface (44, 44C) and the second sucking surface (46, 46C) are respectively bent at the first position and the second position. a supporter (38, 38E); a first holder (40, 40A, 40B, 40C, 40D) with a proximal end thereof supported by the supporter (38, 38E), the first holder (40, 40A, 40B, 40C, 40D) having a first sucking surface (44, 44C) that is bendable at any position and that sucks an object using negative pressure; and a second holder (42, 42A, 42B, 42C, 42D) with a proximal end thereof supported by the supporter (38, 38E), the second holder (42, 42A, 42B, 42C, 42D) having a second sucking surface (46, 46C) that is bendable at any position and that sucks the object using negative pressure, wherein the first holder (40, 40A, 40B, 40C, 40D) and the second holder (42, 42A, 42B, 42C, 42D) are arranged such that, when the apparatus does not hold the object, the first sucking surface (44, 44C) opposes the second sucking surface (46, 46C), wherein, when the first holder (40, 40A, 40B, 40C, 40D) and the second holder (42, 42A, 42B, 42C, 42D) hold the object, in a state in which the first sucking surface (44, 44C) is bent at a first position and the second sucking surface (46, 46C) is bent at a second position, the object is sucked to a region of the first sucking surface (44, 44C) between the first position and a distal end of the first holder (40, 40A, 40B, 40C, 40D), and the object is sucked to a region of the second sucking surface (46, 46C) between the second position and a distal end of the second holder (42, 42A, 42B, 42C, 42D), and wherein the first holder (40, 40A, 40B, 40C, 40D) and the second holder (42, 42A, 42B, 42C, 42D) are formed of an elastic material, characterized in that the first holder (40, 40A, 40B, 40C, 40D) and the second holder (42, 42A, 42B, 42C, 42D) are configured such that, when the distal ends (40b, 42b) of the first holder (40, 40A, 40B, 40C, 40D) and the second holder (42, 42A, 42B, 42C, 42D) are pressed to the object, the first sucking surface (44, 44C) and the second sucking surface (46, 46C) are respectively bent at the first position and the second position.