A plasma display panel 10 includes a front substrate 11 and a back substrate 17 facing each other with a discharge space held therebetween, the surrounding areas of the substrates 11 and 17 being sealed up with a sealing layer 23, and partition walls 21 for sectioning the discharge space in a display area 31 into a plurality of discharge spaces. An exhaust/lead-in port 25 for exhausting and introducing discharge gas from and into the discharge spaces is provided in the outer peripheral non-display area 32 of one of the front and back substrates 11 and 17 and a lead-in rib 24 for defining a lead-in passage 41 from the exhaust/lead-in port 25 is provided. The dimension 42a of the space between the front substrate 11 and the back substrate 17 in the portion provided with the sealing layer 23 and the lead-in rib 24 is uniformized.