A storage box for a straddled vehicle, the storage box being configured to store a portable information terminal, the storage box comprising: a storage portion including an opening for putting-in and taking-out of the portable information terminal, an inner sidewall, and at least one restriction portion opposed to the inner sidewall, the storage portion being configured to store the portable information terminal such that the portable information terminal stands between the inner sidewall and the at least one restriction portion; a lid portion capable of transitioning to a closed state and an opened state, the lid portion being configured to close the opening in the closed state, the lid portion being configured to open the opening in the opened state, the lid portion being opposed to the inner sidewall in the closed state; at least one elastic member disposed on at least either the lid portion or the inner sidewall, the at least one elastic member being configured to press the portable information terminal in a thickness direction of the portable information terminal between the lid portion or the inner sidewall in the closed state to hold the portable information terminal in the storage portion; and a shaft portion configured to pivotably support the lid portion, wherein the inner sidewall extends in approximately a vehicle up-and-down direction or extends to gradually approach the at least one restriction portion from below to above, the inner sidewall and the at least one restriction portion produce a space therebetween so as to allow the portable information terminal to tilt toward the at least one restriction portion in the opened state, and the at least one restriction portion is apart from the portable information terminal in the closed state, characterized in that the at least one restriction portion contacts with the portable information terminal on a front or rear surface side of the portable information terminal so as to restrict movement of the portable information terminal when the lid portion transitions from the closed state to the opened state. a storage portion including an opening for putting-in and taking-out of the portable information terminal, an inner sidewall, and at least one restriction portion opposed to the inner sidewall, the storage portion being configured to store the portable information terminal such that the portable information terminal stands between the inner sidewall and the at least one restriction portion; a lid portion capable of transitioning to a closed state and an opened state, the lid portion being configured to close the opening in the closed state, the lid portion being configured to open the opening in the opened state, the lid portion being opposed to the inner sidewall in the closed state; at least one elastic member disposed on at least either the lid portion or the inner sidewall, the at least one elastic member being configured to press the portable information terminal in a thickness direction of the portable information terminal between the lid portion or the inner sidewall in the closed state to hold the portable information terminal in the storage portion; and a shaft portion configured to pivotably support the lid portion, wherein the inner sidewall extends in approximately a vehicle up-and-down direction or extends to gradually approach the at least one restriction portion from below to above, the inner sidewall and the at least one restriction portion produce a space therebetween so as to allow the portable information terminal to tilt toward the at least one restriction portion in the opened state, and the at least one restriction portion is apart from the portable information terminal in the closed state, characterized in that the at least one restriction portion contacts with the portable information terminal on a front or rear surface side of the portable information terminal so as to restrict movement of the portable information terminal when the lid portion transitions from the closed state to the opened state.