A customized surgical guide comprising: at least one guide tube through which a medical instrument is insertable; and a body portion cover covering a surface of a specific body portion, wherein the body portion cover is coupled to the at least one guide tube, wherein the body portion cover has a hole through which the medical instrument passes, wherein the medical instrument passes through the guide tube and then through the hole toward the body portion, wherein the body portion cover is shaped to conform to a surface of the body portion of a patient, wherein the body portion cover defines a position of the guide tube such that the medical instrument reaches a target point within the body portion, wherein the guide tube has a larger inner diameter than an outer diameter of the medical instrument, wherein a first point is present on the surface of the body portion, and the guide tube is coupled to the body portion cover at a position thereof corresponding to the first point, wherein the target point is present on a surface of or inside a treatment target region, or is spaced by a specific distance from the treatment target region, wherein the guide tube has a length sized such that an insertable depth of the medical instrument into the body is limited to a set depth from the first point to the target point, and wherein when the medical instrument is a syringe with a specific needle length, the guide tube is formed so that the syringe needle reaches the target point, wherein the target point is a specific point on a surface of the treatment target region in the body portion, wherein while the syringe is removed away from the target point through the guide tube, the syringe is configured to supply dye to form a dye column in the body portion, and characterised in that the customized surgical guide is made of deformable material and is configured to be inserted using a laparoscope into the body and then to be placed on the body portion surface. at least one guide tube through which a medical instrument is insertable; and a body portion cover covering a surface of a specific body portion, wherein the body portion cover is coupled to the at least one guide tube, wherein the body portion cover has a hole through which the medical instrument passes, wherein the medical instrument passes through the guide tube and then through the hole toward the body portion, wherein the body portion cover is shaped to conform to a surface of the body portion of a patient, wherein the body portion cover defines a position of the guide tube such that the medical instrument reaches a target point within the body portion, wherein the guide tube has a larger inner diameter than an outer diameter of the medical instrument, wherein a first point is present on the surface of the body portion, and the guide tube is coupled to the body portion cover at a position thereof corresponding to the first point, wherein the target point is present on a surface of or inside a treatment target region, or is spaced by a specific distance from the treatment target region, wherein the guide tube has a length sized such that an insertable depth of the medical instrument into the body is limited to a set depth from the first point to the target point, and wherein when the medical instrument is a syringe with a specific needle length, the guide tube is formed so that the syringe needle reaches the target point, wherein the target point is a specific point on a surface of the treatment target region in the body portion, wherein while the syringe is removed away from the target point through the guide tube, the syringe is configured to supply dye to form a dye column in the body portion, and characterised in that the customized surgical guide is made of deformable material and is configured to be inserted using a laparoscope into the body and then to be placed on the body portion surface.