A capacitor (100), provided with a first capacitor layer (101) having a first substrate (110) to which a first trench structure (125) having a trench part is provided, a first electrode (115), and a second electrode (119) provided in a region of the first trench structure (125) that includes the trench part (126); and a second capacitor layer (103) having a second substrate (130), a third electrode (139), and a fourth electrode (135). The first capacitor layer (101) and the second capacitor layer (103) are disposed so that the second electrode (119) and the third electrode (139) face each other and are electrically connected to each other.