| 摘要 |
A developing apparatus 130 is accommodated within a laser printer 100. The developing apparatus 130 includes a developing casing 131 and a toner electric field transport body 132. The toner electric field transport body 132 includes a transport wiring substrate 133 and a transport-substrate support member 134. A plurality of transport electrodes 133b are provided on the transport wiring substrate 133. The transport wiring substrate 133 is supported by the transport-substrate support member 134 in a state in which the transport wiring substrate 133 is deformed in a tubular shape. Further, the transport wiring substrate 133 is supported by the transport-substrate support member 134 such that margin areas of the transport wiring substrate 133, which are opposite end portions of the transport wiring substrate 133 with respect to a sub-scanning direction and in which the transport electrodes 133b are not formed, are separated from a tonner transport path.
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