NOVELTY - The apparatus has a battery positioned behind an excavation tool of a front-end part of an excavation head (3). A drive circuit is positioned behind the battery. A super magnetostrictor (35) is positioned behind the drive circuit. The battery, the drive circuit, the super magnetostrictor, and a vibration transmission part (37) are positioned linearly along axial direction of the excavation head. The vibration transmission part is provided with an element case (36) such that movement of a non-open-cutting excavator to the axial direction of the excavation head is possible.    USE - Information transmission apparatus for use on an excavation head provided in a front-end part of a drill rod of a non-open-cutting excavator to transmit information e.g. position and temperature, of the excavation head to a main body side of the non-open-cutting excavator for constructing underground embedding work e.g. water pipe, gas pipe and power line, and ground improvement of a base part of an existing building.    ADVANTAGE - The battery, the drive circuit, the super magnetostrictor, and the vibration transmission part are positioned linearly at the axial direction of the excavation head, so that information such as position of the excavation head and temperature, can be efficiently transmitted to a main body side of the non-open-cutting excavator. The cylindrical-shaped bearing part is made from synthetic resin, so that generation of abrasion by friction among the vibration transmission part, element case, and a connection part can be prevented. The vibration transmission part is pressed by a flexible press part, so that transmission of vibration to a drill rod from a vibration transmission part can be performed efficiently. The drive circuit is accommodated through an anti-vibration part in the circuit case, so that damage and deterioration of the drive circuit by the vibration at the time of excavation can be prevented.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of a structure of an excavation head.    Excavation head (3)    Circuit case (32)    Super magnetostrictor (35)    Element case (36)    Vibration transmission part (37)