A passenger conveyor comprising: a plurality of footsteps configured to move in a front-rear direction; a drive device configured to move the footsteps; a pair of right and left guardrails erected on both right and left sides of the footsteps; and a guardrail belt configured to run on the pair of right and left guardrails in synchronization with the footsteps, wherein the passenger conveyor has: cameras (72L, 72R) provided at a platform of the handrail, wherein a camera is provided downward at the top of the guardrail at a bottom of a guardrail rail on which the guardrail belt runs in each of the pair of right and left guardrails an inlet unit (46, 48) through which the guardrail belt enters or exits, provided in a front skirt guard of a lower part of the platform of the handrail; and a control device configured to analyze an image obtained by photographing the platform with the cameras, detect a passenger getting in from the platform, stop the footsteps using the drive device or lower a running speed than a normal speed when detecting no passenger for a predetermined time, and move the running speed of the footsteps at the normal speed, using the drive device, when detecting the passenger, and to detect whether an object is present in the vicinity of the inlet unit, and give a warning when detecting the object. a plurality of footsteps configured to move in a front-rear direction; a drive device configured to move the footsteps; a pair of right and left guardrails erected on both right and left sides of the footsteps; and a guardrail belt configured to run on the pair of right and left guardrails in synchronization with the footsteps, wherein the passenger conveyor has: cameras (72L, 72R) provided at a platform of the handrail, wherein a camera is provided downward at the top of the guardrail at a bottom of a guardrail rail on which the guardrail belt runs in each of the pair of right and left guardrails an inlet unit (46, 48) through which the guardrail belt enters or exits, provided in a front skirt guard of a lower part of the platform of the handrail; and a control device configured to analyze an image obtained by photographing the platform with the cameras, detect a passenger getting in from the platform, stop the footsteps using the drive device or lower a running speed than a normal speed when detecting no passenger for a predetermined time, and move the running speed of the footsteps at the normal speed, using the drive device, when detecting the passenger, and to detect whether an object is present in the vicinity of the inlet unit, and give a warning when detecting the object. cameras (72L, 72R) provided at a platform of the handrail, wherein a camera is provided downward at the top of the guardrail at a bottom of a guardrail rail on which the guardrail belt runs in each of the pair of right and left guardrails an inlet unit (46, 48) through which the guardrail belt enters or exits, provided in a front skirt guard of a lower part of the platform of the handrail; and a control device configured to analyze an image obtained by photographing the platform with the cameras, detect a passenger getting in from the platform, stop the footsteps using the drive device or lower a running speed than a normal speed when detecting no passenger for a predetermined time, and move the running speed of the footsteps at the normal speed, using the drive device, when detecting the passenger, and to detect whether an object is present in the vicinity of the inlet unit, and give a warning when detecting the object.