A portable analyzer comprising: hole forming means (1, 2) designed to form a hole for insertion of a specimen sampling implement therein; and analyzing means (5, 70, 71) capable of analyzing a specimen when the sampling implement is inserted into the hole, the hole forming means (1, 2) including a first member having a first region corresponding to a portion of an internal surface of the hole, and a second member having a second region corresponding to another portion of the internal surface of the hole, wherein the first and second members (1, 2) are capable of rotating relative to each other in opposed directions while being coupled to each other, the relative movement enabling selective switching to one of a first state or a second state, wherein in the first state, a first end portion of the first member and a first end portion of the second member are positioned close to each other in opposed relation, and the first and second regions (R1, R2) are positioned close to each other in opposed relation to form the hole, and wherein in the second state, after the first and second regions have been released from the first state, the first end portions of the first and second members (1, 2) are spaced apart from each other to define a flared open space therebetween, and the first and second regions (R1, R2) face towards the space defined between the first end portions such that at least one of the first and second regions (R1, R2) is exposed to outside, characterized in that the portable analyzer further comprises slide guide means (12, 22) configured to enable the second member to be slid relative to the first member, wherein the second member can be slid from its position in the first state, in a sliding direction in which the sampling implement can be inserted into or withdrawn from the hole, and in that the first and second members (1, 2) are allowed to rotate relative to each other for switching from the first state to the second state only after the first and second members (1, 2) have been slid relative to each other by a predetermined amount of displacement in the sliding direction. hole forming means (1, 2) designed to form a hole for insertion of a specimen sampling implement therein; and analyzing means (5, 70, 71) capable of analyzing a specimen when the sampling implement is inserted into the hole, the hole forming means (1, 2) including a first member having a first region corresponding to a portion of an internal surface of the hole, and a second member having a second region corresponding to another portion of the internal surface of the hole, wherein the first and second members (1, 2) are capable of rotating relative to each other in opposed directions while being coupled to each other, the relative movement enabling selective switching to one of a first state or a second state, wherein in the first state, a first end portion of the first member and a first end portion of the second member are positioned close to each other in opposed relation, and the first and second regions (R1, R2) are positioned close to each other in opposed relation to form the hole, and wherein in the second state, after the first and second regions have been released from the first state, the first end portions of the first and second members (1, 2) are spaced apart from each other to define a flared open space therebetween, and the first and second regions (R1, R2) face towards the space defined between the first end portions such that at least one of the first and second regions (R1, R2) is exposed to outside, characterized in that the portable analyzer further comprises slide guide means (12, 22) configured to enable the second member to be slid relative to the first member, wherein the second member can be slid from its position in the first state, in a sliding direction in which the sampling implement can be inserted into or withdrawn from the hole, and in that the first and second members (1, 2) are allowed to rotate relative to each other for switching from the first state to the second state only after the first and second members (1, 2) have been slid relative to each other by a predetermined amount of displacement in the sliding direction.