A brittleness evaluation apparatus comprising: a jig unit comprising: two jigs (20, 20') having top surfaces formed in a horizontal plane and where a specimen is arranged along a length direction, and provided to face each other such that a groove having a width gradually decreasing downward from the top surfaces is formed; a pressing plate provided perpendicular to a length direction of the specimen above the jigs (20, 20') and causing the specimen to bend by descending to be inserted into the groove while pressing the specimen; and a guide located on each of the top surfaces of the jigs (20, 20') and being configured to restrict lateral movement and vertical movement of a portion of the specimen placed on the top surfaces of the jigs (20, 20'), the guide comprising an upper wall portion restricting the vertical movement of the specimen, both side wall portions standing upright on a bottom surface of the upper wall portion to be placed on the top surfaces of the jigs (20, 20') and restricting the lateral movement of the specimen, and a penetrating portion that is a space between the both side wall portions and allowing movement of the specimen in the length direction, wherein the guide is located on each of the top surfaces of the jigs (20, 20') such that the penetrating portions face each other, and the specimen is disposed on the top surfaces of the jigs (20, 20') by penetrating the penetrating portion, a driving unit configured to descend the pressing plate; and a measurement analyzing unit configured to measure force applied to the specimen during the descending of the pressing plate and evaluate brittleness. a jig unit comprising: two jigs (20, 20') having top surfaces formed in a horizontal plane and where a specimen is arranged along a length direction, and provided to face each other such that a groove having a width gradually decreasing downward from the top surfaces is formed; a pressing plate provided perpendicular to a length direction of the specimen above the jigs (20, 20') and causing the specimen to bend by descending to be inserted into the groove while pressing the specimen; and a guide located on each of the top surfaces of the jigs (20, 20') and being configured to restrict lateral movement and vertical movement of a portion of the specimen placed on the top surfaces of the jigs (20, 20'), the guide comprising an upper wall portion restricting the vertical movement of the specimen, both side wall portions standing upright on a bottom surface of the upper wall portion to be placed on the top surfaces of the jigs (20, 20') and restricting the lateral movement of the specimen, and a penetrating portion that is a space between the both side wall portions and allowing movement of the specimen in the length direction, wherein the guide is located on each of the top surfaces of the jigs (20, 20') such that the penetrating portions face each other, and the specimen is disposed on the top surfaces of the jigs (20, 20') by penetrating the penetrating portion, two jigs (20, 20') having top surfaces formed in a horizontal plane and where a specimen is arranged along a length direction, and provided to face each other such that a groove having a width gradually decreasing downward from the top surfaces is formed; a pressing plate provided perpendicular to a length direction of the specimen above the jigs (20, 20') and causing the specimen to bend by descending to be inserted into the groove while pressing the specimen; and a guide located on each of the top surfaces of the jigs (20, 20') and being configured to restrict lateral movement and vertical movement of a portion of the specimen placed on the top surfaces of the jigs (20, 20'), the guide comprising an upper wall portion restricting the vertical movement of the specimen, both side wall portions standing upright on a bottom surface of the upper wall portion to be placed on the top surfaces of the jigs (20, 20') and restricting the lateral movement of the specimen, and a penetrating portion that is a space between the both side wall portions and allowing movement of the specimen in the length direction, wherein the guide is located on each of the top surfaces of the jigs (20, 20') such that the penetrating portions face each other, and the specimen is disposed on the top surfaces of the jigs (20, 20') by penetrating the penetrating portion, a driving unit configured to descend the pressing plate; and a measurement analyzing unit configured to measure force applied to the specimen during the descending of the pressing plate and evaluate brittleness.