A pressure sensor comprising: a first pressure sensitive element including a first conductive layer including first wiring layers and a first dielectric layer; and a second pressure sensitive element including a second conductive layer including second wiring layers, and a second dielectric layer, wherein the first pressure sensitive element and the second pressure sensitive element are stacked so as to be in contact with each other or with another layer interposed therebetween, characterized in that the first conductive layer includes first projections with uppermost portions having conductivity, the second conductive layer includes second projections with uppermost portions having conductivity, the first dielectric layer is provided between the uppermost portions of the first projections and the first wiring layers, the second dielectric layer provided between the uppermost portions of the second projections and the second wiring layers, each of the first projections have a form that projects from the base portion of the first conductive layer towards the first wiring layers such that the uppermost portions of each of the first projections is in contact with the first dielectric layer, each of the second projections have a form that projects from the base portion of the second conductive layer towards the second wiring layers such that the uppermost portions of each of the second projections is in contact with the second dielectric layer, each of the first projections has a tapered shape that can be elastically deformed, thereby causing an increase in the contact area between each of the first projections and the first dielectric layer, and each of the second projections has a tapered shape that can be elastically deformed, thereby causing an increase in the contact area between each of the second projections and the second dielectric layer. a first pressure sensitive element including a first conductive layer including first wiring layers and a first dielectric layer; and a second pressure sensitive element including a second conductive layer including second wiring layers, and a second dielectric layer, wherein the first pressure sensitive element and the second pressure sensitive element are stacked so as to be in contact with each other or with another layer interposed therebetween, characterized in that the first conductive layer includes first projections with uppermost portions having conductivity, the second conductive layer includes second projections with uppermost portions having conductivity, the first dielectric layer is provided between the uppermost portions of the first projections and the first wiring layers, the second dielectric layer provided between the uppermost portions of the second projections and the second wiring layers, each of the first projections have a form that projects from the base portion of the first conductive layer towards the first wiring layers such that the uppermost portions of each of the first projections is in contact with the first dielectric layer, each of the second projections have a form that projects from the base portion of the second conductive layer towards the second wiring layers such that the uppermost portions of each of the second projections is in contact with the second dielectric layer, each of the first projections has a tapered shape that can be elastically deformed, thereby causing an increase in the contact area between each of the first projections and the first dielectric layer, and each of the second projections has a tapered shape that can be elastically deformed, thereby causing an increase in the contact area between each of the second projections and the second dielectric layer.