A bone-in meat deboning apparatus (10A, 10B), comprising: a clamper for holding a piece of bone-in meat (t) having a first end and a second end and including a bone head at least in the second end; a first cutter capable of moving toward and away with respect to the piece of bone-in meat (t) being held by the clamper at the first end, for making a cut (c) in a circumferential direction on a meat portion (m) of the piece of bone-in meat (t) in a vicinity of a held section of the piece of bone-in meat (t); at least one meat-portion peeling member which is insertable into the cut (c) on the piece of bone-in meat (t) being held by the clamper and comprises a pair of meat-portion peeling members (54, 56) which are movable toward and away relative to each other; an elastic support part (68, 88) for elastically supporting the at least one meat-portion peeling member so that the at least one meat-portion peeling member applies an elastic force to the piece of bone-in meat (t); a meat-portion-peeling driving part capable of changing a distance between the clamper and the at least one meat-portion peeling member; and a second cutter capable of moving toward and away with respect to the piece of bone-in meat (t) being held by the clamper, for cutting the meat portion (m) adhering to the second end including the bone head of the piece of bone-in meat (t), characterized by further comprising: a detection part for detecting a gap between the pair of meat-portion peeling members (54, 56); and a control device for cutting off the meat portion (m) adhering to the second end by moving the second cutter toward the piece of bone-in meat (t) when the gap between the pair of meat-portion peeling members (54, 56) is at a threshold value or less. a clamper for holding a piece of bone-in meat (t) having a first end and a second end and including a bone head at least in the second end; a first cutter capable of moving toward and away with respect to the piece of bone-in meat (t) being held by the clamper at the first end, for making a cut (c) in a circumferential direction on a meat portion (m) of the piece of bone-in meat (t) in a vicinity of a held section of the piece of bone-in meat (t); at least one meat-portion peeling member which is insertable into the cut (c) on the piece of bone-in meat (t) being held by the clamper and comprises a pair of meat-portion peeling members (54, 56) which are movable toward and away relative to each other; an elastic support part (68, 88) for elastically supporting the at least one meat-portion peeling member so that the at least one meat-portion peeling member applies an elastic force to the piece of bone-in meat (t); a meat-portion-peeling driving part capable of changing a distance between the clamper and the at least one meat-portion peeling member; and a second cutter capable of moving toward and away with respect to the piece of bone-in meat (t) being held by the clamper, for cutting the meat portion (m) adhering to the second end including the bone head of the piece of bone-in meat (t), characterized by further comprising: a detection part for detecting a gap between the pair of meat-portion peeling members (54, 56); and a control device for cutting off the meat portion (m) adhering to the second end by moving the second cutter toward the piece of bone-in meat (t) when the gap between the pair of meat-portion peeling members (54, 56) is at a threshold value or less. a detection part for detecting a gap between the pair of meat-portion peeling members (54, 56); and a control device for cutting off the meat portion (m) adhering to the second end by moving the second cutter toward the piece of bone-in meat (t) when the gap between the pair of meat-portion peeling members (54, 56) is at a threshold value or less.