A television signal transmission system comprising a rack and a plurality of power amplification apparatuses accommodated in a plurality of stages in a vertical direction in the rack, each of the power amplification apparatuses comprising: an amplification unit containing at least one set containing a predetermined number of amplification circuits amplifying power of an RF (Radio Frequency) signal; and a combining unit containing a combiner provided corresponding to the set and combining RF signals output from the amplification circuits belonging to a corresponding set, and then outputting a resultant RF signal, wherein the amplification unit has one chassis storing the amplification circuits, the amplification unit has output connectors for outputting the respective RF signals output from the respective amplification circuits, the output connectors are arranged in a first horizontal direction that is perpendicular to the vertical direction, the combining unit has input connectors into which the respective RF signals output from the respective output connectors of the amplification unit are input, the input connectors are arranged in the first horizontal direction, the output connectors and the input connectors are coaxial connectors, the amplification unit and the combining unit are attachable/detachable through the output connectors and the input connectors, the combining unit is disposed on a deep side relative to the amplification unit in the rack with respect to a second horizontal direction that is orthogonal to the first horizontal direction, the size of a side surface on which the input connectors are provided on the combining unit is set to be smaller than the size of a side surface on which the output connectors are provided on the amplification unit, the height of the side surface of the combining unit is smaller than the height of the side surface of the amplification unit, and the width of the side surface of the combining unit is smaller than the width of the side surface of the amplification unit. an amplification unit containing at least one set containing a predetermined number of amplification circuits amplifying power of an RF (Radio Frequency) signal; and a combining unit containing a combiner provided corresponding to the set and combining RF signals output from the amplification circuits belonging to a corresponding set, and then outputting a resultant RF signal, wherein the amplification unit has one chassis storing the amplification circuits, the amplification unit has output connectors for outputting the respective RF signals output from the respective amplification circuits, the output connectors are arranged in a first horizontal direction that is perpendicular to the vertical direction, the combining unit has input connectors into which the respective RF signals output from the respective output connectors of the amplification unit are input, the input connectors are arranged in the first horizontal direction, the output connectors and the input connectors are coaxial connectors, the amplification unit and the combining unit are attachable/detachable through the output connectors and the input connectors, the combining unit is disposed on a deep side relative to the amplification unit in the rack with respect to a second horizontal direction that is orthogonal to the first horizontal direction, the size of a side surface on which the input connectors are provided on the combining unit is set to be smaller than the size of a side surface on which the output connectors are provided on the amplification unit, the height of the side surface of the combining unit is smaller than the height of the side surface of the amplification unit, and the width of the side surface of the combining unit is smaller than the width of the side surface of the amplification unit.