A mobile communication apparatus that is mounted in or carried by a mobile body, and transmits/receives information to/from an other mobile communication apparatus by wireless communication, wherein: the mobile communication apparatus comprises: request transmission means configured to transmit conversation request information including predetermined conversation type information to the other mobile communication apparatus that exists in a predetermined geographical range including a current position of the mobile communication apparatus; and conversation means configured to transmit conversation content information indicating a content of a conversation to the other mobile communication apparatus that approves said predetermined conversation type information, wherein said request transmission means transmits through broadcasting the conversation request information including the conversation type information indicating a conversation setting designated by a user of the mobile communication apparatus, wherein the apparatus is characterized in that the request transmission means transmits access information to a predetermined management device designated as a redirect destination corresponding to the conversation type information, and said conversation means is configured to transmit the conversation content information through said predetermined management device, after the other mobile communication apparatus has approved the conversation request information. the mobile communication apparatus comprises: request transmission means configured to transmit conversation request information including predetermined conversation type information to the other mobile communication apparatus that exists in a predetermined geographical range including a current position of the mobile communication apparatus; and conversation means configured to transmit conversation content information indicating a content of a conversation to the other mobile communication apparatus that approves said predetermined conversation type information, wherein request transmission means configured to transmit conversation request information including predetermined conversation type information to the other mobile communication apparatus that exists in a predetermined geographical range including a current position of the mobile communication apparatus; and conversation means configured to transmit conversation content information indicating a content of a conversation to the other mobile communication apparatus that approves said predetermined conversation type information, wherein said request transmission means transmits through broadcasting the conversation request information including the conversation type information indicating a conversation setting designated by a user of the mobile communication apparatus, wherein the apparatus is characterized in that the request transmission means transmits access information to a predetermined management device designated as a redirect destination corresponding to the conversation type information, and said conversation means is configured to transmit the conversation content information through said predetermined management device, after the other mobile communication apparatus has approved the conversation request information.