A model for pre-procedure verification of a dental treatment plan, comprising: a model main body formed based on a jaw of a patient in a size and a shape identical to at least a part of a treatment objective site of the jaw of the patient and configured to model the at least a part of the treatment objective site; an opening defining portion provided in the model main body and configured to define an opening corresponding to a recessed opening (70, 318, 718) for embedding an embedded body in the treatment objective site; and a target model portion configured to model a target adjacent to or embedded in an alveolar bone (312, 712) of the treatment objective site, the target model portion allowing a distal end of a procedural instrument used for a treatment to be out of contact with the target model portion under a condition that the procedural instrument passes through the opening defining portion in a positional relationship of the target model portion identical to a positional relationship of the target relative to the treatment objective site, or the target model portion allowing the distal end of the procedural instrument to be in contact with the target model portion under a condition that the procedural instrument passes through the opening defining portion in a positional relationship of the target model portion closer than the positional relationship of the target relative to the treatment objective site, wherein: a space is formed between the opening defining portion and the target model portion to allow visual recognition of a range present between the opening defining portion and the target model portion, the range including a reachable range of the distal end of the procedural instrument from the opening defining portion toward the target model portion and a reachable range of the distal end of the procedural instrument from the opening defining portion in a teeth alignment direction and a direction intersecting the teeth alignment direction. a model main body formed based on a jaw of a patient in a size and a shape identical to at least a part of a treatment objective site of the jaw of the patient and configured to model the at least a part of the treatment objective site; an opening defining portion provided in the model main body and configured to define an opening corresponding to a recessed opening (70, 318, 718) for embedding an embedded body in the treatment objective site; and a target model portion configured to model a target adjacent to or embedded in an alveolar bone (312, 712) of the treatment objective site, the target model portion allowing a distal end of a procedural instrument used for a treatment to be out of contact with the target model portion under a condition that the procedural instrument passes through the opening defining portion in a positional relationship of the target model portion identical to a positional relationship of the target relative to the treatment objective site, or the target model portion allowing the distal end of the procedural instrument to be in contact with the target model portion under a condition that the procedural instrument passes through the opening defining portion in a positional relationship of the target model portion closer than the positional relationship of the target relative to the treatment objective site, the target model portion allowing a distal end of a procedural instrument used for a treatment to be out of contact with the target model portion under a condition that the procedural instrument passes through the opening defining portion in a positional relationship of the target model portion identical to a positional relationship of the target relative to the treatment objective site, or the target model portion allowing the distal end of the procedural instrument to be in contact with the target model portion under a condition that the procedural instrument passes through the opening defining portion in a positional relationship of the target model portion closer than the positional relationship of the target relative to the treatment objective site, wherein: a space is formed between the opening defining portion and the target model portion to allow visual recognition of a range present between the opening defining portion and the target model portion, the range including a reachable range of the distal end of the procedural instrument from the opening defining portion toward the target model portion and a reachable range of the distal end of the procedural instrument from the opening defining portion in a teeth alignment direction and a direction intersecting the teeth alignment direction.