Hearing aid fitting device

A hearing aid fitting device, comprising:

• an input section to which hearing ability data for a user are inputted;
• a hearing aid reader that reads, from the hearing aid, usage environment log data for each of a plurality of types of usage environment and adjustment value parameters for each of the plurality of types of usage environment;
• a transmitter that transmits the hearing ability data, usage environment log data, and adjustment value parameters read by the hearing aid reader;
• an adjustment value parameter extractor that extracts a user close to the hearing ability data of the hearing aid user transmitted from the transmitter, extracts adjustment value parameters for each usage environment corresponding to a plurality of usage environments set by the hearing aid user from among the plurality of usage environments set by the extracted user, and extracts and transmits adjustment value parameters for each usage environment close to the usage environment log data of the hearing aid user from the extracted adjustment value parameters for each of the extracted usage environments;
• a receiver that receives adjustment value parameters for each of the plurality of types of usage environment extracted and transmitted by the adjustment value parameter extractor;
• and
• a hearing aid writer that writes the adjustment value parameters to an adjustment value data storage section of the hearing aid.