A current sensor comprising: a wiring substrate; and magnetoelectric conversion elements provided in the wiring substrate and configured to detect magnetism generated by an electric current flowing through a current path to be measured, wherein a cutout for positioning the current path to be measured in a center of an imaginary rectangle is formed in the wiring substrate, 4 magnetoelectric conversion elements (15a, 15f, 15g, 151) out of the magnetoelectric conversion elements are provided in 4 corners of the rectangle, remaining magnetoelectric conversion elements (15b, 15c, 15d, 15e, 15h, 15i, 15j, 15k) of the magnetoelectric conversion elements are provided on long sides of the rectangle, the magnetoelectric conversion elements are provided so as to be line-symmetrical with respect to a first imaginary line being parallel to the long sides of the rectangle and passing through the center of the imaginary rectangle and to be point-symmetrical with respect to the center, each of the magnetoelectric conversion elements (15b, 15c, 15d, 15e, 15h, 15i, 15j, 15k) on the long sides is placed within a range of an angle of 45° from a second imaginary line in a clockwise or counterclockwise direction about the center, the second imaginary line being orthogonal to the first imaginary line and passing through the center, directions of sensitivity axes of the magnetoelectric conversion elements (15b, 15c, 15d, 15e, 15h, 15i, 15j, 15k) placed on the long sides are parallel to the long sides,, and directions of sensitivity axes of the magnetoelectric conversion elements located at point-symmetrical positions centered on the center are equal or opposite to each other, characterized in that directions of sensitivity axes of the magnetoelectric conversion elements (15a, 15f, 15g, 151) placed on the corners are parallel to short sides. a wiring substrate; and magnetoelectric conversion elements provided in the wiring substrate and configured to detect magnetism generated by an electric current flowing through a current path to be measured, wherein a cutout for positioning the current path to be measured in a center of an imaginary rectangle is formed in the wiring substrate, 4 magnetoelectric conversion elements (15a, 15f, 15g, 151) out of the magnetoelectric conversion elements are provided in 4 corners of the rectangle, remaining magnetoelectric conversion elements (15b, 15c, 15d, 15e, 15h, 15i, 15j, 15k) of the magnetoelectric conversion elements are provided on long sides of the rectangle, the magnetoelectric conversion elements are provided so as to be line-symmetrical with respect to a first imaginary line being parallel to the long sides of the rectangle and passing through the center of the imaginary rectangle and to be point-symmetrical with respect to the center, each of the magnetoelectric conversion elements (15b, 15c, 15d, 15e, 15h, 15i, 15j, 15k) on the long sides is placed within a range of an angle of 45° from a second imaginary line in a clockwise or counterclockwise direction about the center, the second imaginary line being orthogonal to the first imaginary line and passing through the center, directions of sensitivity axes of the magnetoelectric conversion elements (15b, 15c, 15d, 15e, 15h, 15i, 15j, 15k) placed on the long sides are parallel to the long sides,, and directions of sensitivity axes of the magnetoelectric conversion elements located at point-symmetrical positions centered on the center are equal or opposite to each other, characterized in that directions of sensitivity axes of the magnetoelectric conversion elements (15a, 15f, 15g, 151) placed on the corners are parallel to short sides.