Eligibility Criteria:
Inclusion Criteria:
* Have a diagnosis of plaque-type psoriasis for at least 6 months before the first administration of study drug
* Have a Psoriasis Area and Severity Index (PASI) greater than (\>)10 or Body Surface Area (BSA) \>10 at screening and at baseline
* Have a Dermatology Life Quality Index (DLQI) \>10 at screening and at baseline
* Agree not to receive a live virus or live bacterial vaccination during the study, or within 3 months after the last administration of study drug; for information on Bacille Calmette-Guérin (BCG) vaccination, agree not to receive a BCG vaccination during the study, or within 12 months after the last administration of study drug
* No dipstick detection of proteins or glucose in urine. If there are signs of proteins and/or glucose on urine test strip, the urine sample must be analyzed centrally. Here, protein and glucose levels must not exceed trace levels, example, \<=(+); one re-test (central urine analysis) is allowed
Exclusion Criteria:
* Has a history or current signs or symptoms of severe, progressive, or uncontrolled liver or renal insufficiency, significant cardiac, vascular, pulmonary, gastrointestinal, endocrine, neurologic, hematologic, rheumatologic, psychiatric, or metabolic disturbances
* Participants with nonplaque forms of psoriasis (for example, erythrodermic, guttate, or pustular) or with current drug-induced psoriasis (for example, a new onset of psoriasis or an exacerbation of psoriasis from beta blockers, calcium channel blockers, or lithium)
* Known allergies, hypersensitivity, or intolerance to Guselkumab or its excipients
* Is pregnant, or breast-feeding, or planning to become pregnant while enrolled in this study or within 12 weeks after the last dose of study drug
* Any condition for which, in the opinion of the investigator, participation would not be in the best interest of the participant (for example, compromise the well-being) or that could prevent, limit, or confound the protocol-specified assessments