To provide an iron core and a motor for preventing reduction in motor drive efficiency. An iron core includes laminate section (1) made up of a lamination of plural soft magnetic ribbons (36), fixed to metal substrate (7), and provided with winding (9), and fastening part (6) that pressurizes laminate section (1) in a lamination direction of soft magnetic ribbons. Also, the fastening part (6) is disposed around an opening of through-hole (10) that penetrates laminate section (1). Furthermore, a metal plate (3a) shaped so as not to cover winding section (9) is provided between laminate section(1) and fastening part (6). Besides, the motor includes a rotor and the iron core.