Television tuner having input and output signals sufficiently isolated from each other

A television tuner comprising:

• a conductive frame having a first side plate, a second side plate opposite to the first side plate, a third side plate, and a fourth side plate;
• a first shield plate dividing the frame into a first division adjacent to the first side plate and a second division adjacent to the second side plate;
• a distributing section including a distributor that splits one television signal into two television signal components;
• a tuning section that converts a frequency of a first of the two television signal components into an intermediate-frequency signal;
• a first connector that receives the television signal;
• and
• a second connector from which a second of the two television signal components is output,
• wherein the first connector is disposed on the third side plate at a portion forming the first division, the second connector is disposed on the first side plate, the distributing section is disposed in the first division, and the tuning section is disposed in the second division.