An on-train information providing device that provides passengers of a train with video data of on-train advertisements transmitted from a ground transmitting and receiving device to an on-train transmitting and receiving device, comprising: a storage unit that stores therein the video data, a program listing including a plurality of entries in which a valid period of the video data is stored in correspondence with each video data name representing the title of the video data, a plurality of items of first audio data, and an audio listing in which a file number that is an identification number of an audio file corresponding to each item of the first audio data is associated with an audio file name; a sound recognizing unit that is adapted to retrieve the video data and the program listing from the storage unit, determine for each entry of the program listing whether the video data contains therein second audio data and attach an audio flag that is information for distinguishing video data including the second audio data from video data not including the second audio data to the program listing, and store the program listing back in the storage unit; and a controlling unit that is adapted to read the program listing to which the audio flag is attached, determine for each entry whether the video data falls within the valid period, transmit the video data to a display device that is arranged on the train to reproduce the video data, and if so, transmit the first audio data selected from the audio listing or the second audio data included with the video data in correspondence with the attached audio flag to a wireless transmitting unit that transmits the first audio data or the second audio data as a radio signal to audio reproducing devices of the passengers. a storage unit that stores therein the video data, a program listing including a plurality of entries in which a valid period of the video data is stored in correspondence with each video data name representing the title of the video data, a plurality of items of first audio data, and an audio listing in which a file number that is an identification number of an audio file corresponding to each item of the first audio data is associated with an audio file name; a sound recognizing unit that is adapted to retrieve the video data and the program listing from the storage unit, determine for each entry of the program listing whether the video data contains therein second audio data and attach an audio flag that is information for distinguishing video data including the second audio data from video data not including the second audio data to the program listing, and store the program listing back in the storage unit; and a controlling unit that is adapted to read the program listing to which the audio flag is attached, determine for each entry whether the video data falls within the valid period, transmit the video data to a display device that is arranged on the train to reproduce the video data, and if so, transmit the first audio data selected from the audio listing or the second audio data included with the video data in correspondence with the attached audio flag to a wireless transmitting unit that transmits the first audio data or the second audio data as a radio signal to audio reproducing devices of the passengers.