Solid-state image sensor and automatic-focus camera using the same

A solid-state image sensor for automatic focus having at least first and second paired linear sensors, each comprising a linear sensor for standard portion and a linear sensor for reference portion for performing phase difference detection type focus detection,

• the linear sensor for standard portion of said second paired linear sensors being arranged between the linear sensor for standard portion and the linear sensor for reference portion of said first paired linear sensors, the linear sensor for reference portion of said first paired linear sensors being arranged between the linear sensor for standard portion and the linear sensor for reference portion of said second paired linear sensors, and a dummy pixel being provided for at least one of portions between said linear sensor for standard portion and said linear sensor for reference portion, which are adjacent to each other, between said plural linear sensors for standard portion, and between said plural linear sensors for reference portion.