A destination floor registration device of an elevator which performs a call registration by voice recognition using a voice input section which receives the input of a voice uttered by a user of the elevator, comprising: a storage section which stores a destination floor vocabulary dictionary in which voice data of predetermined destination floor words representing destination floors of call registrations are registered in a plurality of numbers; an elevator information obtaining section which obtains from the elevator an elevator status including at least information on service possible floors and service impossible floors of the elevator; an automatic dictionary setting section which automatically sets, for each of the destination floor words registered in the destination floor vocabulary dictionary, whether or not the destination floor word is used in the voice recognition on the basis of the elevator status obtained by the elevator information obtaining section (If); a voice recognition section which performs the voice recognition by judging whether or not a voice inputted to the voice input section matches the voice data of any of destination floor words which are set by the automatic dictionary setting section to be used in the voice recognition among the destination floor words of the destination floor vocabulary dictionary; a destination floor registration section which, in the case where the voice inputted to the voice input section is judged to match the voice data of the destination floor word, outputs to an elevator control section a request for the registration of a call to a destination floor represented by the relevant matched destination floor word; and a microphone which is provided in a car of the elevator and takes in a service floor guiding announcement made in the car upon arrival of the car at a service floor, characterized in that the automatic dictionary setting section sets the destination floor words of the destination floor vocabulary dictionary used in the voice recognition on the basis of the service floor guiding announcement taken in by the microphone. a storage section which stores a destination floor vocabulary dictionary in which voice data of predetermined destination floor words representing destination floors of call registrations are registered in a plurality of numbers; an elevator information obtaining section which obtains from the elevator an elevator status including at least information on service possible floors and service impossible floors of the elevator; an automatic dictionary setting section which automatically sets, for each of the destination floor words registered in the destination floor vocabulary dictionary, whether or not the destination floor word is used in the voice recognition on the basis of the elevator status obtained by the elevator information obtaining section (If); a voice recognition section which performs the voice recognition by judging whether or not a voice inputted to the voice input section matches the voice data of any of destination floor words which are set by the automatic dictionary setting section to be used in the voice recognition among the destination floor words of the destination floor vocabulary dictionary; a destination floor registration section which, in the case where the voice inputted to the voice input section is judged to match the voice data of the destination floor word, outputs to an elevator control section a request for the registration of a call to a destination floor represented by the relevant matched destination floor word; and a microphone which is provided in a car of the elevator and takes in a service floor guiding announcement made in the car upon arrival of the car at a service floor, characterized in that the automatic dictionary setting section sets the destination floor words of the destination floor vocabulary dictionary used in the voice recognition on the basis of the service floor guiding announcement taken in by the microphone.