A photosensor comprising: a sensor circuit assembly including: a light emitting element and a light receiving element that face each other; a light-emitter support that extends from the light emitting element and supports the light emitting element; a light-receiver support that extends from the light receiving element and supports the light receiving element; and a connecting part that connects one end of the light-emitter support and one end of the light-receiver support; the connecting part comprising: a lead frame, a seal part sealing at least a portion of the lead frame; and a plurality of connection terminals (26 - 29) including a first connection terminal which is connected to the lead frame and protrudes from the seal part; characterized in that the first connection terminal comprises: a first press-contact part configured to establish contact with a first wire by being pressed in a press-contact direction, a first pressure part configured to be used to press the first press-contact part in the press-contact direction; and a joining part that connects the first press-contact part to the lead frame, the first connection terminal being bent in the press-contact direction at the joining part, wherein the photosensor comprises: a holder that supports the first wire; and the holder includes: a first wire housing that houses the first wire; and a first terminal housing that houses the first connection terminal; wherein the first wire is pressed into contact with the first connection terminal within the first wire housing, wherein the first press-contact part of the first connection terminal includes a slit, whe rein the first terminal housing includes a protrusion; the protrusion protrudes from a bottom of the first terminal housing toward the slit; and the bottom of the first terminal housing faces a tip end of the first connection terminal when the first terminal housing houses the first connection terminal. a light-emitter support that extends from the light emitting element and supports the light emitting element; a light-receiver support that extends from the light receiving element and supports the light receiving element; and a connecting part that connects one end of the light-emitter support and one end of the light-receiver support; the connecting part comprising: a lead frame, a seal part sealing at least a portion of the lead frame; and a plurality of connection terminals (26 - 29) including a first connection terminal which is connected to the lead frame and protrudes from the seal part; a lead frame, a seal part sealing at least a portion of the lead frame; and a plurality of connection terminals (26 - 29) including a first connection terminal which is connected to the lead frame and protrudes from the seal part; characterized in that the first connection terminal comprises: a first press-contact part configured to establish contact with a first wire by being pressed in a press-contact direction, a first pressure part configured to be used to press the first press-contact part in the press-contact direction; and a joining part that connects the first press-contact part to the lead frame, the first connection terminal being bent in the press-contact direction at the joining part, wherein the photosensor comprises: a holder that supports the first wire; and a first press-contact part configured to establish contact with a first wire by being pressed in a press-contact direction, a first pressure part configured to be used to press the first press-contact part in the press-contact direction; and a joining part that connects the first press-contact part to the lead frame, the first connection terminal being bent in the press-contact direction at the joining part, wherein the photosensor comprises: a holder that supports the first wire; and the holder includes: a first wire housing that houses the first wire; and a first terminal housing that houses the first connection terminal; wherein the first wire is pressed into contact with the first connection terminal within the first wire housing, wherein the first press-contact part of the first connection terminal includes a slit, whe rein the first terminal housing includes a protrusion; a first wire housing that houses the first wire; and a first terminal housing that houses the first connection terminal; wherein the first wire is pressed into contact with the first connection terminal within the first wire housing, the protrusion protrudes from a bottom of the first terminal housing toward the slit; and the bottom of the first terminal housing faces a tip end of the first connection terminal when the first terminal housing houses the first connection terminal.